日期:2014-05-20  浏览次数:20705 次

请问关于JAVA窗口间的数值传递
请问各位,如何实现在Main窗口中点击按钮弹出用户另一个窗口RequestValueDialog,让用户在两个textfield中输入数据,点击OK后将输入数据回传给原来窗口显示在文本框中?
因为类中有其他方法,可以不使用静态变量吗?
貌似不能传图片,那就传简单的示例代码。
Main.java
Java code

public class Main extends JFrame (){
        private JPanel contentPane;
    private JButton btnClick;
    private JTextField textField;
        public static void main(String[] args) {
                new Main().setVisible(true);
        }
        public Main() {
        initGUI();
    }
    private void initGUI() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(new BorderLayout(0, 0));
        
        btnClick = new JButton("click");
        contentPane.add(btnClick, BorderLayout.NORTH);
        
        textField = new JTextField();
        contentPane.add(textField, BorderLayout.CENTER);
    }
}


RequestValueDialog.java
Java code

public class  RequestValueDialog extends JDialog(){
        public RequestValueDialog() {
        setBounds(100, 100, 450, 300);
        getContentPane().setLayout(new BorderLayout());
        contentPanel.setLayout(new FlowLayout());
        contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
        getContentPane().add(contentPanel, BorderLayout.CENTER);
        {
            textField = new JTextField();
            contentPanel.add(textField);
            textField.setColumns(10);
        }
        {
            textField_1 = new JTextField();
            textField_1.setColumns(10);
            contentPanel.add(textField_1);
        }
        {
            textField_2 = new JTextField();
            textField_2.setColumns(10);
            contentPanel.add(textField_2);
        }
        {
            JPanel buttonPane = new JPanel();
            buttonPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
            getContentPane().add(buttonPane, BorderLayout.SOUTH);
            {
                JButton okButton = new JButton("OK");
                okButton.setActionCommand("OK");
                buttonPane.add(okButton);
                getRootPane().setDefaultButton(okButton);
            }
            {
                JButton cancelButton = new JButton("Cancel");
                cancelButton.setActionCommand("Cancel");
                buttonPane.add(cancelButton);
            }
        }
    }
}



------解决方案--------------------
JDialog本身有构造方法new JDialog(Frame owner, String title, boolean modal),你直接写

public RequestValueDialog(Frame owner, String title, boolean modal) {
super(owner,title, modal);
………………
}
就行了
------解决方案--------------------
第一个JTextField的内容可以回显到主Frame上面,你参考看看吧

Java code

import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class Main extends JFrame implements ActionListener {
    private JPanel contentPane;
    private JButton btnClick;

    public JTextField getTextField() {
        return textField;
    }

    public void setTextField(JTextField textField) {
        this.textField = textField;
    }

    private JTextField textField;
    
    public static void main(String[] args) {
        new Main().setVisible(true);
    }
    public Main() {
        initGUI();
    }
    private void initGUI() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(new BorderLayout(0, 0));

        btnClick = new JButton("click");
        btnClick.addActionListener(this);
        contentPane.add(btnClick, BorderLayout.NORTH);

        textField = new JTextField();
        contentPane.add(textField, BorderLayout.CENTER);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        //To change body of implemented methods use File | Settings | File Templates.
        if(e.getSource()==btnClick){
            RequestValueDialog dialog=new RequestValueDialog(this);

            dialog.setVisible(true);
           
        }
    }
}