java面向对象之值传递小实例

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package test;//学生类public class Student {     private int id;//编号     private String name;//名称     private String address;//地址          public void setId(int id){     this.id=id;     }     public int getId(){     return id;     }     public void setName(String name){     this.name=name;     }     public String getName(){     return name;     }     public void setAddress(String address){     this.address=address;     }     public String getAddress(){     return address;     }}

package test;import java.awt.Color;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;public class Test1 extends JFrame{   private static final long serialVersionUID = 1L;   private JLabel lblId;   private JLabel lblName;   private JLabel lblAddress;   private JTextField txtId;   private JTextField txtName;   private JTextField txtAddress;   private JButton btn;   private JPanel panel;      public Test1(){   panel=new JPanel();      lblId=new JLabel("编号:");   panel.add(lblId);   txtId=new JTextField(10);   panel.add(txtId);      lblName=new JLabel("用户名:");   panel.add(lblName);   txtName=new JTextField(10);   panel.add(txtName);      lblAddress=new JLabel("地址:");   panel.add(lblAddress);   txtAddress=new JTextField(10);   panel.add(txtAddress);      btn=new JButton("确定");   panel.add(btn);      btn.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {   Student stu=new Student();//创建学生对象   stu.setId(Integer.parseInt(txtId.getText()));//设置标号   stu.setName(txtName.getText());//设置名称   stu.setAddress(txtAddress.getText());//设置地址   Test2 t2=new Test2(stu);//调用带参数的构造函数  }   });   this.add(panel);//将容器面板添加到容器中   setBackground(new Color(80,80,80));//设置背景色   setBounds(300, 300, 200, 300);//设置位置及容器大小   setVisible(true);//设置为可见   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//点击关闭窗口   }   public static void main(String[] args){   Test1 t1=new Test1();   }}

package test;import java.awt.Color;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;public class Test2 extends JFrame{   private JLabel lblId;   private JLabel lblName;   private JLabel lblAddress;   private JTextField txtId;   private JTextField txtName;   private JTextField txtAddress;   private JButton btn;   private JPanel panel;      public Test2(){   panel=new JPanel();   lblId=new JLabel("编号:");   panel.add(lblId);   txtId=new JTextField(10);   panel.add(txtId);      lblName=new JLabel("用户名:");   panel.add(lblName);   txtName=new JTextField(10);   panel.add(txtName);      lblAddress=new JLabel("地址:");   panel.add(lblAddress);   txtAddress=new JTextField(10);   panel.add(txtAddress);      btn=new JButton("确定");   panel.add(btn);   this.add(panel);      setVisible(true);   setBackground(new Color(80,80,80));   setBounds(600, 300, 200, 300);   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   }   public Test2(Student stu){   this();//调用本类不带参数的构造函数   txtId.setText(stu.getId()+"");   txtName.setText(stu.getName());   txtAddress.setText(stu.getAddress());   }   public static void main(String[] args){   Test2 t2=new Test2();   }}

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