用java写一个简单的计算器详解代码
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使用java实现一个能进行整行读取并计算的简易计算器
下面计算器的界面：
以及具体的计算形式：
下面是Jisuanapp类的代码：
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */package jisuanapp;/** * * @author Administrator */public class Jisuanapp { /** * @param args the command line arguments */ public static void main(String[] args) { jiemian jiem = new jiemian(); jiem.setTitle("简单的计算器"); jiem.setVisible(true); } }下面是Calculation类的具体代码：
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */package jisuanapp;import java.util.ArrayList;import java.util.Stack;import java.math.BigDecimal;/** * * @author Administrator */public class Calculation { public double calculate(String copy) { char []calculate = copy.toCharArray(); int sum=0; for(int i=0;i<calculate.length;i++) { if((calculate[i]<'0'||calculate[i]>'9')&&calculate[i]!='.') sum++; } sum*=2; sum++; return(results(sum, copy)); } public static double add(double v1,double v2){ BigDecimal b1 = new BigDecimal(Double.toString(v1)); BigDecimal b2 = new BigDecimal(Double.toString(v2)); return b1.add(b2).doubleValue(); } public double results(int longs,String str) { char []calculate = str.toCharArray(); String [] zong = new String[longs]; int startt=0,endd=0,num=0; for(int i =0;i<calculate.length;i++) { if((calculate[i]<'0'||calculate[i]>'9')&&calculate[i]!='.') { endd=i; zong[num++] = str.substring(startt, endd); startt = endd; endd++; zong[num++] = str.substring(startt, endd); startt = i+1; } } zong[num] = str.substring(startt, calculate.length); Stack<Double> s = new Stack<Double>(); double m = Double.parseDouble(zong[0]); s.push(m); for(int i=1;i<=num;i++) { if(i%2==1) { if(zong[i].compareTo("+")==0) { double h = Double.parseDouble(zong[i+1]); s.push(h); } if(zong[i].compareTo("-")==0) { double h = Double.parseDouble(zong[i+1]); s.push(-h); } if(zong[i].compareTo("*")==0) { double h = Double.parseDouble(zong[i+1]); double sign = s.peek(); s.pop(); sign *= h; s.push(sign); } if(zong[i].compareTo("/")==0) { double h = Double.parseDouble(zong[i+1]); double sign = s.peek(); s.pop(); sign /= h; s.push(sign); } } } double sum = 0,result = 0; while(!s.empty()) { result = add(sum, s.peek()); sum = result; s.pop(); } return sum; } }/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */package jisuanapp;import javax.swing.JTextField;/** * * @author Administrator */public class jiemian extends javax.swing.JFrame { /** * Creates new form jiemian */ public jiemian() { initComponents(); } /** * This method is called from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { jTextField1 = new javax.swing.JTextField(); jButton1 = new javax.swing.JButton(); jButton2 = new javax.swing.JButton(); jButton3 = new javax.swing.JButton(); jButton4 = new javax.swing.JButton(); jButton5 = new javax.swing.JButton(); jButton6 = new javax.swing.JButton(); jButton7 = new javax.swing.JButton(); jButton8 = new javax.swing.JButton(); jButton9 = new javax.swing.JButton(); jButton10 = new javax.swing.JButton(); jButton11 = new javax.swing.JButton(); jButton12 = new javax.swing.JButton(); jButton13 = new javax.swing.JButton(); jButton14 = new javax.swing.JButton(); jButton15 = new javax.swing.JButton(); jButton16 = new javax.swing.JButton(); jButton19 = new javax.swing.JButton(); jButton20 = new javax.swing.JButton(); jTextField2 = new javax.swing.JTextField(); jButton17 = new javax.swing.JButton(); jButton18 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setPreferredSize(new java.awt.Dimension(450, 500)); jTextField1.setToolTipText(""); jTextField1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jTextField1ActionPerformed(evt); } }); jButton1.setText("1"); jButton1.setPreferredSize(new java.awt.Dimension(90, 50)); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); jButton2.setText("2"); jButton2.setPreferredSize(new java.awt.Dimension(90, 50)); jButton2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton2ActionPerformed(evt); } }); jButton3.setText("3"); jButton3.setPreferredSize(new java.awt.Dimension(90, 50)); jButton3.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton3ActionPerformed(evt); } }); jButton4.setText("4"); jButton4.setPreferredSize(new java.awt.Dimension(90, 50)); jButton4.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton4ActionPerformed(evt); } }); jButton5.setText("5"); jButton5.setPreferredSize(new java.awt.Dimension(90, 50)); jButton5.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton5ActionPerformed(evt); } }); jButton6.setText("6"); jButton6.setPreferredSize(new java.awt.Dimension(90, 50)); jButton6.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton6ActionPerformed(evt); } }); jButton7.setText("7"); jButton7.setPreferredSize(new java.awt.Dimension(90, 50)); jButton7.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton7ActionPerformed(evt); } }); jButton8.setText("8"); jButton8.setPreferredSize(new java.awt.Dimension(90, 50)); jButton8.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton8ActionPerformed(evt); } }); jButton9.setText("9"); jButton9.setPreferredSize(new java.awt.Dimension(90, 50)); jButton9.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton9ActionPerformed(evt); } }); jButton10.setText("0"); jButton10.setPreferredSize(new java.awt.Dimension(90, 50)); jButton10.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton10ActionPerformed(evt); } }); jButton11.setText("+"); jButton11.setPreferredSize(new java.awt.Dimension(90, 50)); jButton11.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton11ActionPerformed(evt); } }); jButton12.setText("-"); jButton12.setPreferredSize(new java.awt.Dimension(90, 50)); jButton12.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton12ActionPerformed(evt); } }); jButton13.setText("*"); jButton13.setPreferredSize(new java.awt.Dimension(90, 50)); jButton13.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton13ActionPerformed(evt); } }); jButton14.setText("/"); jButton14.setPreferredSize(new java.awt.Dimension(90, 50)); jButton14.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton14ActionPerformed(evt); } }); jButton15.setText("←"); jButton15.setPreferredSize(new java.awt.Dimension(90, 50)); jButton15.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton15ActionPerformed(evt); } }); jButton16.setText("C"); jButton16.setPreferredSize(new java.awt.Dimension(90, 50)); jButton16.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton16ActionPerformed(evt); } }); jButton19.setText("."); jButton19.setPreferredSize(new java.awt.Dimension(90, 50)); jButton19.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton19ActionPerformed(evt); } }); jButton20.setText("="); jButton20.setPreferredSize(new java.awt.Dimension(90, 50)); jButton20.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton20ActionPerformed(evt); } }); jTextField2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jTextField2ActionPerformed(evt); } }); jButton17.setText("AC"); jButton17.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton17ActionPerformed(evt); } }); jButton18.setText("new"); jButton18.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton18ActionPerformed(evt); } }); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(30, 30, 30) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addGroup(layout.createSequentialGroup() .addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton8, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton9, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton13, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(layout.createSequentialGroup() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addComponent(jButton4, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 90, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 90, javax.swing.GroupLayout.PREFERRED_SIZE))) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 90, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton11, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(layout.createSequentialGroup() .addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton12, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))) .addComponent(jTextField1) .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 378, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addComponent(jButton17, javax.swing.GroupLayout.PREFERRED_SIZE, 90, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton16, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(jButton15, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton14, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))) .addGroup(layout.createSequentialGroup() .addComponent(jButton18, javax.swing.GroupLayout.PREFERRED_SIZE, 91, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton10, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton19, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(jButton20, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))) .addContainerGap(1281, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(25, 25, 25) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED) .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(18, 18, 18) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButton14, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton15, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton16, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addComponent(jButton17, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton8, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton9, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton13, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton4, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton12, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 50, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton11, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButton10, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton19, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton20, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addComponent(jButton18, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) .addContainerGap(362, Short.MAX_VALUE)) ); pack(); }// </editor-fold> private int flag = 1; private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "1"); } private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "2"); } private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "3"); } private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "4"); } private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "5"); } private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "6"); } private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "7"); } private void jButton8ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "8"); } private void jButton9ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "9"); } private void jButton10ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField1.getText() + "0"); } private void jButton11ActionPerformed(java.awt.event.ActionEvent evt) { if(jTextField1.getText().compareTo("")!=0) { char []calculate = jTextField1.getText().toCharArray(); char num = calculate[calculate.length - 1]; if(num>='0'&&num<='9') { jTextField1.setText(jTextField1.getText() + "+"); this.flag = 1; } } } private void jButton12ActionPerformed(java.awt.event.ActionEvent evt) { if(jTextField1.getText().compareTo("")!=0) { char []calculate = jTextField1.getText().toCharArray(); char num = calculate[calculate.length - 1]; if(num>='0'&&num<='9') { jTextField1.setText(jTextField1.getText() + "-"); this.flag = 1; } } } private void jButton13ActionPerformed(java.awt.event.ActionEvent evt) { if(jTextField1.getText().compareTo("")!=0) { char []calculate = jTextField1.getText().toCharArray(); char num = calculate[calculate.length - 1]; if(num>='0'&&num<='9') { jTextField1.setText(jTextField1.getText() + "*"); this.flag = 1; } } } private void jButton14ActionPerformed(java.awt.event.ActionEvent evt) { if(jTextField1.getText().compareTo("")!=0) { char []calculate = jTextField1.getText().toCharArray(); char num = calculate[calculate.length - 1]; if(num>='0'&&num<='9') { jTextField1.setText(jTextField1.getText() + "/"); this.flag = 1; } } } public String getjTextField1() { return jTextField1.getText(); } private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) { } private void jButton20ActionPerformed(java.awt.event.ActionEvent evt) { if(jTextField1.getText().compareTo("")!=0) { Calculation ji = new Calculation(); double sum = ji.calculate(jTextField1.getText()); jTextField2.setText(Double.toString(sum)); } } private void jButton15ActionPerformed(java.awt.event.ActionEvent evt) { if(jTextField1.getText().compareTo("")!=0) { if(jTextField1.getText().substring(jTextField1.getText().length()-1,jTextField1.getText().length()).compareTo(".") == 0) flag = 1; jTextField1.setText(jTextField1.getText().substring(0,jTextField1.getText().length() -1)); } } private void jButton16ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(""); flag = 1; } private void jButton19ActionPerformed(java.awt.event.ActionEvent evt) { if(jTextField1.getText().compareTo("")!=0) { char []calculate = jTextField1.getText().toCharArray(); char num = calculate[calculate.length - 1]; if(num>='0'&&num<='9'&&this.flag == 1) { jTextField1.setText(jTextField1.getText() + "."); this.flag = 0; } } } private void jTextField2ActionPerformed(java.awt.event.ActionEvent evt) { } private void jButton17ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(""); jTextField2.setText(""); flag = 1; } private void jButton18ActionPerformed(java.awt.event.ActionEvent evt) { jTextField1.setText(jTextField2.getText()); flag = 0; jTextField2.setText(""); } /** * @param args the command line arguments */ public static void main(String args[]) { /* Set the Nimbus look and feel */ //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(jiemian.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(jiemian.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(jiemian.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(jiemian.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //</editor-fold> /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new jiemian().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JButton jButton1; private javax.swing.JButton jButton10; private javax.swing.JButton jButton11; private javax.swing.JButton jButton12; private javax.swing.JButton jButton13; private javax.swing.JButton jButton14; private javax.swing.JButton jButton15; private javax.swing.JButton jButton16; private javax.swing.JButton jButton17; private javax.swing.JButton jButton18; private javax.swing.JButton jButton19; private javax.swing.JButton jButton2; private javax.swing.JButton jButton20; private javax.swing.JButton jButton3; private javax.swing.JButton jButton4; private javax.swing.JButton jButton5; private javax.swing.JButton jButton6; private javax.swing.JButton jButton7; private javax.swing.JButton jButton8; private javax.swing.JButton jButton9; private javax.swing.JTextField jTextField1; private javax.swing.JTextField jTextField2; // End of variables declaration }阅读全文
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