怎么利用按钮关闭JDialog???

小兵比克 2011-09-10 05:24:00

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。

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小兵比克 2011-09-10

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谢谢，谢谢，学习了，我新手，请问命名规范是……课上讲过，我没有太记

风尘中国 2011-09-10

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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("----------");





    }



}

打油的程序员 2011-09-10

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openListener这个类还没贴上来

风尘中国 2011-09-10

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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();

            }



        });

    }

}

小兵比克 2011-09-10

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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();
}
}

}