怎么利用按钮关闭JDialog???

Question

不知道是不是我写的不对，点击按钮后没有反应，我设置监听器了，相关代码如下：
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
public class saveListener implements ActionListener {

JDialog saveDialog = new JDialog (Diary.diary, "提示", true);
JLabel saveLabel = new JLabel ("保存成功");
JButton knownButton = new JButton ("我知道了"); public void actionPerformed(ActionEvent e) {
String contents = Diary.diary.WriteArea.getText(); /*必须放在要执行的方法体里边*/
saveDialog.setBounds(100, 100, 250, 80);
saveDialog.setLayout(new GridLayout(2, 1));
saveLabel.setHorizontalAlignment(SwingConstants.CENTER);
saveDialog.add(saveLabel);
saveDialog.add(knownButton);
saveDialog.setVisible(true);

WriteOut(contents);

knownButton.addActionListener(new ActionListener () { public void actionPerformed(ActionEvent e) {

saveDialog.dispose();
}

});
}
主要问题是：写着“我知道了”的按钮knownButton点击后，没有反应，我用的是.dispose()这个函数。

Answer 1

你先在你的saveDialog.dispose();前面加一句输出语句，或者debug一下  确定一下 这里的代码是不是执行了。

Answer 2

全部如下：
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class Diary extends JFrame {

static Diary diary = new Diary();
static JTextField TitleField = new JTextField(30);
static JTextArea WriteArea = new JTextArea(30, 50);
JPanel jp = new JPanel();

public static void main(String[] args) {
diary.launchFrame(); }

public void launchFrame () {
this.setLocation(400, 100);
this.setSize(700, 630);
this.setBackground(new Color(100, 100, 100));
this.setTitle("日记薄");
this.setVisible(true);
this.setResizable(false);
this.addWindowListener(new WindowAdapter() {
public void windowClosing (WindowEvent e) {
dispose();
System.exit(0);
}
});
this.assignFrame();

}
public void assignFrame() {
JButton saveButton = new JButton("保存"); JButton openButton = new JButton("打开"); JButton closeButton = new JButton("关闭");
JPanel TitleFieldPanel = new JPanel(); JPanel WriteAreaPanel = new JPanel(); JPanel ButtonPanel = new JPanel();
Container pane = this.getContentPane();
SimpleDateFormat YMD = new SimpleDateFormat ("yyyy年MM月dd日----EEE");
String title = YMD.format(new Date());
JScrollPane js = new JScrollPane(WriteArea); /*必须把进度条new在方法体里边*/

WriteArea.setLineWrap(true);
pane.setLayout(new BorderLayout()); /*增加进度条*/
TitleFieldPanel.add(TitleField);
TitleField.setText(title);
WriteAreaPanel.add(js);
pane.add(WriteAreaPanel);
pane.add("North", TitleFieldPanel);/* pane.add("Center", WriteAreaPanel)*/; pane.add("East", ButtonPanel);

ButtonPanel.setLayout(new GridLayout (3, 1));

ButtonPanel.add(saveButton); ButtonPanel.add(openButton); ButtonPanel.add(closeButton);
saveButton.addActionListener(new saveListener());
openButton.addActionListener(new openListener());
closeButton.addActionListener(new ActionListener () { public void actionPerformed(ActionEvent e) {
dispose();
System.exit(0);
}

});





}

}import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
public class saveListener implements ActionListener {

JDialog saveDialog = new JDialog (Diary.diary, "提示", true);
JLabel saveLabel = new JLabel ("保存成功");
JButton knownButton = new JButton ("我知道了"); public void actionPerformed(ActionEvent e) {
String contents = Diary.diary.WriteArea.getText(); /*必须放在要执行的方法体里边*/
saveDialog.setBounds(100, 100, 250, 80);
saveDialog.setLayout(new GridLayout(2, 1));
saveLabel.setHorizontalAlignment(SwingConstants.CENTER);
saveDialog.add(saveLabel);
saveDialog.add(knownButton);
saveDialog.setVisible(true);

WriteOut(contents);

knownButton.addActionListener(new ActionListener () { public void actionPerformed(ActionEvent e) {
System.out.println("看看执行没有");
saveDialog.dispose();
}

});
}

public void WriteOut (String s) {
File f = new File ("f:\\diaries");
f.mkdirs();
try {
FileOutputStream savingContent = new FileOutputStream ("f:\\diaries\\" + Diary.diary.TitleField.getText() + ".txt", true);
OutputStreamWriter osw = new OutputStreamWriter (savingContent);
osw.write(s);
osw.flush();
osw.close();
} catch (IOException e) {
e.printStackTrace();
}
}}

Answer 3

你的代码很有问题，简要说
1.对话框不关闭的问题。之所以dispose方法没有执行，是因为你对 “我知道了”那个按钮的添加侦听在setVisible()方法之后，实际上必须要在setVisible之前添加才有效
2.添加各个面板之前就setVisible，导致无法看到界面，如果那样做必须valiate()一下
3.代码很多地方不符合Java命名规范
给你直接贴出来可以跑的代码了，open的侦听你没贴出来代码，我注解掉了
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class Diary extends JFrame {    static Diary diary = new Diary();
    static JTextField TitleField = new JTextField(30);
    static JTextArea WriteArea = new JTextArea(30, 50);
    JPanel jp = new JPanel();    public static void main(String[] args) {
        diary.launchFrame();    }    public void launchFrame () {
        this.setLocation(400, 100);
        this.setSize(700, 630);
        this.setBackground(new Color(100, 100, 100));
        this.setTitle("日记薄");
        this.setVisible(true);
        this.setResizable(false);
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing (WindowEvent e) {
                dispose();
                System.exit(0);
            }
        });
        this.assignFrame();    }
    public void assignFrame() {
        JButton saveButton = new JButton("保存");
        JButton openButton = new JButton("打开");
        JButton closeButton = new JButton("关闭");
        JPanel titleFieldPanel = new JPanel();
        JPanel writeAreaPanel = new JPanel();
        JPanel buttonPanel = new JPanel();
        Container pane = this.getContentPane();
        SimpleDateFormat YMD = new SimpleDateFormat ("yyyy年MM月dd日----EEE");
        String title = YMD.format(new Date());
        JScrollPane js = new JScrollPane(WriteArea);  /*必须把进度条new在方法体里边*/        WriteArea.setLineWrap(true);
        pane.setLayout(new BorderLayout());  /*增加进度条*/
        titleFieldPanel.add(TitleField);
        TitleField.setText(title);
        writeAreaPanel.add(js);
        pane.add(writeAreaPanel);
        pane.add("North", titleFieldPanel);/* pane.add("Center", WriteAreaPanel)*/;
        pane.add("East", buttonPanel);        buttonPanel.setLayout(new GridLayout (3, 1));        buttonPanel.add(saveButton);
        buttonPanel.add(openButton);
        buttonPanel.add(closeButton);
        saveButton.addActionListener(new SaveListener());
//openButton.addActionListener(new openListener());
        closeButton.addActionListener(new ActionListener () {            public void actionPerformed(ActionEvent e) {
                dispose();
                System.exit(0);
            }        });         pane.validate();
        System.out.println("----------");
    }}
import java.awt.*;
import java.awt.event.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
public class SaveListener implements ActionListener {    JDialog saveDialog = new JDialog ();
    JLabel saveLabel = new JLabel ("保存成功");
    JButton knownButton = new JButton ("我知道了");    //actionPerformed
    public void actionPerformed(ActionEvent e) {
//        String contents = Diary.diary.WriteArea.getText();  /*必须放在要执行的方法体里边*/
        saveDialog.setBounds(100, 100, 250, 80);
        saveDialog.setLayout(new GridLayout(2, 1));
        saveLabel.setHorizontalAlignment(SwingConstants.CENTER);
        saveDialog.add(saveLabel);
        saveDialog.add(knownButton);
        saveDialog.setVisible(true);//WriteOut(contents);        knownButton.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                saveDialog.dispose();
//                saveDialog.dispose();
            }        });
    }
}

Answer 4

openListener这个类 还没贴上来

Answer 5

不好意思上个帖子的SaveListener贴错了，重新贴一下import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
public class SaveListener implements ActionListener {    JDialog saveDialog = new JDialog (Diary.diary, "提示", true);
    JLabel saveLabel = new JLabel ("保存成功");
    JButton knownButton = new JButton ("我知道了");    public void actionPerformed(ActionEvent e) {
        String contents = Diary.diary.WriteArea.getText();  /*必须放在要执行的方法体里边*/
        saveDialog.setBounds(100, 100, 250, 80);
        saveDialog.setLayout(new GridLayout(2, 1));
        saveLabel.setHorizontalAlignment(SwingConstants.CENTER);
        saveDialog.add(saveLabel);
        saveDialog.add(knownButton);
        knownButton.addActionListener(new ActionListener () {            public void actionPerformed(ActionEvent e) {
                System.out.println("看看执行没有");
                saveDialog.dispose();
            }        });        saveDialog.setVisible(true);        WriteOut(contents);
    }    public void WriteOut (String s) {
        File f = new File ("f:\\diaries");
        f.mkdirs();
        try {
            FileOutputStream savingContent = new FileOutputStream ("f:\\diaries\\" + Diary.diary.TitleField.getText() + ".txt", true);
            OutputStreamWriter osw = new OutputStreamWriter (savingContent);
            osw.write(s);
            osw.flush();
            osw.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }}--------------------------------------import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class Diary extends JFrame {    static Diary diary = new Diary();
    static JTextField TitleField = new JTextField(30);
    static JTextArea WriteArea = new JTextArea(30, 50);
    JPanel jp = new JPanel();    public static void main(String[] args) {
        diary.launchFrame();    }    public void launchFrame () {
        this.setLocation(400, 100);
        this.setSize(700, 630);
        this.setBackground(new Color(100, 100, 100));
        this.setTitle("日记薄");
        this.setVisible(true);
        this.setResizable(false);
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing (WindowEvent e) {
                dispose();
                System.exit(0);
            }
        });
        this.assignFrame();    }
    public void assignFrame() {
        JButton saveButton = new JButton("保存");
        JButton openButton = new JButton("打开");
        JButton closeButton = new JButton("关闭");
        JPanel titleFieldPanel = new JPanel();
        JPanel writeAreaPanel = new JPanel();
        JPanel buttonPanel = new JPanel();
        Container pane = this.getContentPane();
        SimpleDateFormat YMD = new SimpleDateFormat ("yyyy年MM月dd日----EEE");
        String title = YMD.format(new Date());
        JScrollPane js = new JScrollPane(WriteArea);  /*必须把进度条new在方法体里边*/        WriteArea.setLineWrap(true);
        pane.setLayout(new BorderLayout());  /*增加进度条*/
        titleFieldPanel.add(TitleField);
        TitleField.setText(title);
        writeAreaPanel.add(js);
        pane.add(writeAreaPanel);
        pane.add("North", titleFieldPanel);/* pane.add("Center", WriteAreaPanel)*/;
        pane.add("East", buttonPanel);        buttonPanel.setLayout(new GridLayout (3, 1));        buttonPanel.add(saveButton);
        buttonPanel.add(openButton);
        buttonPanel.add(closeButton);
        saveButton.addActionListener(new SaveListener());
//openButton.addActionListener(new openListener());
        closeButton.addActionListener(new ActionListener () {            public void actionPerformed(ActionEvent e) {
                dispose();
                System.exit(0);
            }        });         pane.validate();
        System.out.println("----------");
    }}