简单计算器java源码

package caculator;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.text.DecimalFormat;
import javax.swing.*;

public class 计算_复杂 extends JFrame implements ActionListener, ItemListener {
private JButton an[];

private JButton qingkong, zh;

private JTextField k;

private JPanel rq1, rq2, rq3;

int zz = 1;

private String string[] = { "7", "8", "9", "/", "6", "5", "4", "*", "3",
    "2", "1", "-", "0", ".", "=", "+" };

private String s = "", shu1 = "", shu2 = "", shu3 = "";

private static int fo = 0;

JComboBox a;

private boolean ff = true;

public 计算_复杂() {
   super("进制计算器");
   Container c = getContentPane();
   c.setLayout(new FlowLayout());
   rq1 = new JPanel();
   k = new JTextField(13);
   rq1.add(k);
   qingkong = new JButton("C");
   rq1.add(qingkong);
   c.add(rq1);
   rq3 = new JPanel();
   a = new JComboBox();
   a.addItem("10进制转换为2进制");
   a.addItem("10进制转换为8进制");
   a.addItem("10进制转换为16进制");
   a.addItem("2进制转换为8进制");
   a.addItem("2进制转换为10进制");
   a.addItem("2进制转换为16进制");
   a.addItem("8进制转换为2进制");
   a.addItem("8进制转换为10进制");
   a.addItem("8进制转换为16进制");
   a.addItem("16进制转换为2进制");
   a.addItem("16进制转换为8进制");
   a.addItem("16进制转换为10进制");
   rq3.add(a);
   zh = new JButton("转");
   rq3.add(zh);
   c.add(rq3);
   rq2 = new JPanel();
   rq2.setLayout(new GridLayout(4, 4, 10, 10));
   an = new JButton[string.length];
   for (int i = 0; i < string.length; i++) {
    an[i] = new JButton(string[i]);
    an[i].addActionListener(this);
    rq2.add(an[i]);
   }
   c.add(rq2);
   qingkong.addActionListener(this);
   zh.addActionListener(this);
   a.addItemListener(this);
   setSize(200, 250);
   setVisible(true);
   try {
    JMenuItem itemNative=new JMenuItem("系统平台风格");
    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); // 设置界面样式
   } catch (Exception e) {
    e.printStackTrace();
   }
   setSize(220, 270);
   setVisible(true);
}

public static void main(String[] args) {
   计算_复杂 s = new 计算_复杂();
   s.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void itemStateChanged(ItemEvent event) {
   if (event.getStateChange() == ItemEvent.SELECTED) {
    if (a.getSelectedItem().equals("10进制转换为2进制"))
     zz = 1;
    if (a.getSelectedItem().equals("10进制转换为8进制"))
     zz = 2;
    if (a.getSelectedItem().equals("10进制转换为16进制"))
     zz = 3;
    if (a.getSelectedItem().equals("2进制转换为8进制"))
     zz = 4;
    if (a.getSelectedItem().equals("2进制转换为10进制"))
     zz = 5;
    if (a.getSelectedItem().equals("2进制转换为16进制"))
     zz = 6;
    if (a.getSelectedItem().equals("8进制转换为2进制"))
     zz = 7;
    if (a.getSelectedItem().equals("8进制转换为10进制"))
     zz = 8;
    if (a.getSelectedItem().equals("8进制转换为16进制"))
     zz = 9;
    if (a.getSelectedItem().equals("16进制转换为2进制"))
     zz = 10;
    if (a.getSelectedItem().equals("16进制转换为8进制"))
     zz = 11;
    if (a.getSelectedItem().equals("16进制转换为10进制"))
     zz = 12;
   }
}

public void actionPerformed(ActionEvent e) {
   if (!(e.getSource() == an[3] || e.getSource() == an[7]
     || e.getSource() == an[11] || e.getSource() == an[13]
     || e.getSource() == an[14] || e.getSource() == an[15] || e
     .getSource() == qingkong|| e.getSource() == zh)) {
    if (e.getSource() == an[12]) {
     s += e.getActionCommand();
     char a = s.charAt(0);
     if (a == '0') {
      s = "0.";
      k.setText(s);
     }
     else{
      k.setText(s);
      ff = true;
     }
   
     }
      else {
     s += e.getActionCommand();
     k.setText(s);
     ff = true;
    }
   } else {
    if (e.getSource() == zh) {
     if (k.getText().equals(""))
      ;
     else
     {
      jinzhi();
      fo = 0;
      shu1 = "";
      s = "";
     }
    }
    if (e.getSource() == qingkong) {
     k.setText("");
     fo = 0;
     shu1 = "";
     s = "";
    }
    if (e.getSource() == an[13]) {
     String ss = s;
     ss += e.getActionCommand();
     char a = ss.charAt(0);
     if (a == '.') {
      s = "";
     } else {
      if (ss.matches("[0-9].")) {
       s += e.getActionCommand();
       k.setText(s);
      }
     }

    }
    if (ff) {
     ff = false;
     if (e.getSource() == an[3]) {
      if (k.getText().equals(""))
       ;
      else {

       if (shu1.equals("")) {
        shu1 = k.getText();
        k.setText("/");
        s = "";
        fo = 3;
       } else {
        shu2 = k.getText();
        jishu(fo, shu1, shu2);
        fo = 3;
       }
      }
     }
     if (e.getSource() == an[7]) {
      if (k.getText().equals(""))
       ;
      else {
       if (shu1.equals("")) {
        shu1 = k.getText();
        k.setText("*");
        s = "";
        fo = 7;
       } else {
        shu2 = k.getText();
        jishu(fo, shu1, shu2);
        fo = 7;
       }
      }
     }
     if (e.getSource() == an[11]) {
      if (k.getText().equals(""))
       ;
      else {
       if (shu1.equals("")) {
        shu1 = k.getText();
        k.setText("-");
        s = "";
        fo = 11;
       } else {
        shu2 = k.getText();
        jishu(fo, shu1, shu2);
        fo = 11;
       }
      }
     }
     if (e.getSource() == an[15]) {
      if (k.getText().equals(""))
       ;
      else {
       if (shu1.equals("")) {
        shu1 = k.getText();
        k.setText("+");
        s = "";
        fo = 15;
       } else {
        shu2 = k.getText();
        jishu(fo, shu1, shu2);
        fo = 15;
       }
      }
     }
     if (e.getSource() == an[14]) {
      if (k.getText().equals("") || shu1.equals(""))
       ff = true;
      else {
       shu2 = k.getText();
       jishu(fo, shu1, shu2);
      }
     }
    }
   }
}

public void jishu(int fj, String s1, String s2) {
   DecimalFormat twoDigits = new DecimalFormat("0.00");
   double a, b;
   a = Double.parseDouble(s1);
   b = Double.parseDouble(s2);
   switch (fj) {
   case 3:
    shu3 = twoDigits.format((double) (a / b));
    k.setText(shu3);
    break;
   case 7:
    shu3 = twoDigits.format((double) (a * b));
    k.setText(shu3);
    break;
   case 11:
    shu3 = twoDigits.format((double) (a - b));
    k.setText(shu3);
    break;
   case 15:
    shu3 = twoDigits.format((double) (a + b));
    k.setText(shu3);
    break;
   }
   s = "";
   shu1 = shu3;
   shu2 = "";
}

public void jinzhi() {
try{
   if (zz == 1)
    k.setText(Integer.toBinaryString(Integer.parseInt(k.getText())));
   else if (zz == 2)
    k.setText(Integer.toOctalString(Integer.parseInt(k.getText())));
   else if (zz == 3)
    k.setText(Integer.toHexString(Integer.parseInt(k.getText())));
   else if (zz == 4) {
    int a = j1(k.getText(), "[0-1]+", 2);
    k.setText(Integer.toOctalString(a));
   } else if (zz == 5) {
    j1(k.getText(), "[0-1]+", 2);

   } else if (zz == 6) {
    int a = j1(k.getText(), "[0-1]+", 2);
    k.setText(Integer.toHexString(a));
   } else if (zz == 7) {
    int a = j1(k.getText(), "[0-7]+", 8);
    k.setText(Integer.toBinaryString(a));
   } else if (zz == 8) {
    j1(k.getText(), "[0-7]+", 8);
   } else if (zz == 9) {
    int a = j1(k.getText(), "[0-7]+", 8);
    k.setText(Integer.toHexString(a));
   } else if (zz == 10) {
    int a = j2();
    k.setText(Integer.toBinaryString(a));
   } else if (zz == 11) {
    int a = j2();
    k.setText(Integer.toOctalString(a));
   } else if (zz == 12) {
    j2();
   }
}
catch(Exception e)
{
   JOptionPane.showMessageDialog(null, "检查输入的参数");
}
}

public int j1(String zhuanhuan, String a1, int a3) {
   if (zhuanhuan.matches(a1)) {
    int bb, gg = 0, cc = 1;
    String s = zhuanhuan;
    StringBuffer ss = new StringBuffer(s);

    ss.reverse();
    for (int i = 0; i < ss.length(); i++) {
     String jj = ss.charAt(i) + "";
     bb = Integer.parseInt(jj);
     if (i == 0)
      gg += bb * cc;
     else
      gg += bb * (cc *= a3);
    }
    k.setText(gg + "");
    return gg;
   }
   return 0;
}

public int j2() {
   if (k.getText().matches("[0-9,a,b,c,d,e,f]+")) {
    int bb, gg = 0, cc = 1;
    String s = k.getText();
    StringBuffer ss = new StringBuffer(s);
    ss.reverse();
    for (int i = 0; i < ss.length(); i++) {
     String jj = ss.charAt(i) + "";
     System.out.println(jj);
     if (jj.equals("a"))
      jj = "10";
     if (jj.equals("b"))
      jj = "11";
     if (jj.equals("c"))
      jj = "12";
     if (jj.equals("d"))
      jj = "13";
     if (jj.equals("e"))
      jj = "14";
     if (jj.equals("f"))
      jj = "15";
     System.out.println(jj);
     bb = Integer.parseInt(jj);
     if (i == 0)
      gg += bb * cc;
     else
      gg += bb * (cc *= 16);
    }
    k.setText(gg + "");
    return gg;
   }
   return 0;
}

}