关于两个窗口间的数据传递

其实道理很简单，关键是在frame1在调用frame2的时候，frame2怎么获得frame1的对象

一种方法是改造frame2的构造函数，例如：

Frame2(Frame1 fObj){}

即把把Frame1类的对象带进Frame2中，那么frame2就可以调用frame1的各种属性和方法了

第二种方法就是不改造Frame2的高造函数，而是写一个方法返回Frame1的对象

例如：

public void getFrame1Object(Frame1 fObj){

f1Obj=fObj；

}

偷个懒，用jbuilder做的测试，ctrl c + v 太方便了

主程序代码：

package 互相调用菜单;

import java.awt.Toolkit;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import java.awt.Dimension;

/**
* <p>Title: </p>
*
* <p>Description: </p>
*
* <p>Copyright: Copyright (c) 2006</p>
*
* <p>Company: </p>
*
* @author not attributable
* @version 1.0
*/
public class Application {
boolean packFrame = false;

/**
* Construct and show the application.
*/
public Application() {
Frame1 frame = new Frame1();
// Validate frames that have preset sizes
// Pack frames that have useful preferred size info, e.g. from their layout
if (packFrame) {
frame.pack();
} else {
frame.validate();
}

// Center the window
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
frame.setLocation((screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.height) / 2);
frame.setVisible(true);
}

/**
* Application entry point.
*
* @param args String[]
*/
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
try {
UIManager.setLookAndFeel(UIManager.
getSystemLookAndFeelClassName());
} catch (Exception exception) {
exception.printStackTrace();
}

new Application();
}
});
}
}

窗口1代码：

package 互相调用菜单;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JButton;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Rectangle;

/**
* <p>Title: </p>
*
* <p>Description: </p>
*
* <p>Copyright: Copyright (c) 2006</p>
*
* <p>Company: </p>
*
* @author not attributable
* @version 1.0
*/
public class Frame1 extends JFrame {
JPanel contentPane;
JButton btn = new JButton();
public Frame1() {
try {
setDefaultCloseOperation(EXIT_ON_CLOSE);
jbInit();
} catch (Exception exception) {
exception.printStackTrace();
}
}

/**
* Component initialization.
*
* @throws java.lang.Exception
*/
private void jbInit() throws Exception {
contentPane = (JPanel) getContentPane();
contentPane.setLayout(null);
setSize(new Dimension(400, 300));
setTitle("我是窗口1");
btn.setBounds(new Rectangle(119, 141, 99, 25));
btn.setText("调用窗口2");
btn.addActionListener(new Frame1_btn_actionAdapter(this));
contentPane.add(btn);
}

public void btn_actionPerformed(ActionEvent e) {
//Frame2 f2Obj=new Frame2(this);//改动构造方法
/*
Frame2 f2Obj=new Frame2();//不改动构造方法（这行和下行一组）
f2Obj.f1Obj=this;
*/
Frame2 f2Obj=new Frame2();
f2Obj.getFrame1Object(this);
f2Obj.setSize(400,300);
f2Obj.setTitle("我是窗口2");
f2Obj.setLocation(this.getX(),this.getY());
f2Obj.setVisible(true);
}

public Object getObjectOfFram1(){
return this;
}
}

class Frame1_btn_actionAdapter implements ActionListener {
private Frame1 adaptee;
Frame1_btn_actionAdapter(Frame1 adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {
adaptee.btn_actionPerformed(e);
}
}

窗口2代码：

package 互相调用菜单;

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JTextField;
import java.awt.*;
import javax.swing.JButton;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Rectangle;

/**
* <p>Title: </p>
*
* <p>Description: </p>
*
* <p>Copyright: Copyright (c) 2006</p>
*
* <p>Company: </p>
*
* @author not attributable
* @version 1.0
*/
public class Frame2 extends JFrame {
Frame1 f1Obj;
JTextField txt = new JTextField();
JButton btn = new JButton();
public Frame2() {
try {
jbInit();
} catch (Exception exception) {
exception.printStackTrace();
}
}
public Frame2(Frame1 f) {
f1Obj=f;
try {
jbInit();
} catch (Exception exception) {
exception.printStackTrace();
}
}

private void jbInit() throws Exception {
getContentPane().setLayout(null);
txt.setText("");
txt.setBounds(new Rectangle(116, 26, 104, 22));
btn.setBounds(new Rectangle(118, 146, 125, 25));
btn.setText("返回窗口1的数据");
btn.addActionListener(new Frame2_btn_actionAdapter(this));
this.getContentPane().add(txt);
this.getContentPane().add(btn);
}

public void btn_actionPerformed(ActionEvent e) {
String str=f1Obj.getTitle();
txt.setText(str);
}

public void getFrame1Object(Frame1 fObj){
f1Obj=fObj;
}
}

class Frame2_btn_actionAdapter implements ActionListener {
private Frame2 adaptee;
Frame2_btn_actionAdapter(Frame2 adaptee) {
this.adaptee = adaptee;
}

public void actionPerformed(ActionEvent e) {

adaptee.btn_actionPerformed(e);
}
}