按钮动作改变所有jtabbedpane jpanel java swing的颜色

时间：2012-01-16 12:49:15

标签： java swing background-color jbutton jtabbedpane

我在tabbedpane中有2个标签（A和B）。 在A中，我只写了setBackground（Color.RED）;

在B中，我放了一个按钮。并且代码喜欢：

A a=new A();

jButton1.addActionListener(new ActionListener() {
  @Override
  public void actionPerformed(ActionEvent e) {
    // TODO Auto-generated method stub
    a.setBackground(Color.BLUE);
    }
});

我想从B的按钮动作中更改A的颜色。但我失败了。 我怎样才能解决这个问题？

提前致谢...

我的问题仍未解决。我发布了整个代码::我使用了2个包：“ok”，“ok1”。 “ok”包含1个名为save.java的文件，代码为：

public class Save extends javax.swing.JFrame {
private JPanel panel1;
private JPanel panel2;A a=new A();B b=new B();



public Save() {
    initComponents();
}

//GEN-BEGIN:initComponents
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
    panel1=a.initComponents();
    panel2=b.initComponents();
    jTabbedPane1 = new javax.swing.JTabbedPane();
    jScrollPane1 = new javax.swing.JScrollPane();
    jScrollPane2 = new javax.swing.JScrollPane();
            setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    jTabbedPane1.addTab("Tab 1", null, panel1, "Just Panel");
    jTabbedPane1.setMnemonicAt(0, KeyEvent.VK_1);

    jTabbedPane1.addTab("Tab 2", null, panel2, "Button");
            jTabbedPane1.setMnemonicAt(1, KeyEvent.VK_2);

“ok1”包含2个文件：A.java和B.java ..... A.java :::::::: 

             public class A extends javax.swing.JPanel {

/** Creates new form A */
public A() {
    initComponents();

}

/** This method is called from within the constructor to
 * initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is
 * always regenerated by the Form Editor.
 */
//GEN-BEGIN:initComponents
// <editor-fold defaultstate="collapsed" desc="Generated Code">
public JPanel initComponents() {

    jPanel11 = new javax.swing.JPanel();

    javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(
            jPanel11);
            jPanel11.setLayout(jPanel1Layout);

B.java :::::::: 

             public class B extends javax.swing.JPanel {
A a = new A();

/** Creates new form B */
public  B() {
    initComponents();


}

/** This method is called from within the constructor to
 * initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is
 * always regenerated by the Form Editor.
 */
//GEN-BEGIN:initComponents
// <editor-fold defaultstate="collapsed" desc="Generated Code">
public JPanel initComponents() {

    jPanel1 = new javax.swing.JPanel();
    jButton1 = new javax.swing.JButton();

    jButton1.setText("Action");
    jButton1.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
            a.jPanel11.setBackground(Color.RED);
        }
    });

3 个答案:

答案 0 :(得分：1)

引用TabColors，它以匹配制表符和内容颜色开头，以下修改过的TabContent构造函数添加了一个按钮，使所有窗格使用相同的颜色。

private TabContent(final int i, Color color) {
    setOpaque(true);
    setBackground(color);
    add(new JLabel("Tab content " + String.valueOf(i)));
    add(new JButton(new AbstractAction("Use my color") {

        @Override
        public void actionPerformed(ActionEvent e) {
            for (int j = 0; j < pane.getTabCount(); j++) {
                pane.getComponentAt(j).setBackground(
                    pane.getBackgroundAt(i));
            }
        }
    }));
}

答案 1 :(得分：1)

看着你的代码，你似乎做错了。首先不要写这些行

private JPanel panel1;
private JPanel panel2;

代替写：

private A a = new A();
private B b = new B(a);

由于a和b，它们本身就是Panels，因为它们扩展了JPanel类。

现在将其添加到tabbedPane：

jTabbedPane1.addTab("Tab 1", null, a/*This is your Panel1*/, "Just Panel");
jTabbedPane1.addTab("Tab 2", null, b/*This is your Panel2*/, "Button");

只需将一个JPanel变量添加到B类中，然后按如下方式更改B类的构造函数：

JPanel panel1;

public B(JPanel panel)
{
    pane1 = panel;
    initComponents(); // make this method return void in it's definition, in both the classes.
}

现在在actionPerformed（）方法内执行此操作：

jButton1.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {
            // TODO Auto-generated method stub
            panel1.setBackground(Color.RED);
        }
    });

以下是从上一次提交中修改的小程序，类似于您的情况：

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

public class TabbedPaneExample extends JPanel
{
    private Panel1 panel1;
    private Panel2 panel2;

    public TabbedPaneExample()
    {
        super(new GridLayout(1, 1));

        JTabbedPane tabbedPane = new JTabbedPane();

        //panel1 = getPanel("Panel Number 1");  
        panel1 = new Panel1("Panel Number 1");
        tabbedPane.addTab("Tab 1", null, panel1, "Just Panel");
        tabbedPane.setMnemonicAt(0, KeyEvent.VK_1);

        //panel2 = getPanelWithButton("COLOR");
        panel2 = new Panel2("COLOR", panel1);
        tabbedPane.addTab("Tab 2", null, panel2, "Button");
        tabbedPane.setMnemonicAt(1, KeyEvent.VK_2);

        add(tabbedPane);

        tabbedPane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
    }

    private static void createAndDisplayGUI()
    {
        JFrame frame = new JFrame("Tabbed Pane Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.add(new TabbedPaneExample(), BorderLayout.CENTER);

        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String... args)
    {
        SwingUtilities.invokeLater(new Runnable()
            {
                public void run()
                {
                    createAndDisplayGUI();
                }
            });
    }
}

class Panel1 extends JPanel
{
    public JLabel label;
    public Panel1(String text)
    {       
        label = new JLabel(text);
        label.setHorizontalAlignment(JLabel.CENTER);
        setLayout(new GridLayout(1, 1));
        setBackground(Color.RED);
        add(label);
    }
}

class Panel2 extends JPanel
{
    public JButton button;
    public JPanel panel1;

    public Panel2(String text, JPanel panel)
    {
            panel1 = panel;
        button = new JButton(text);
        button.addActionListener(new ActionListener()
            {
                public void actionPerformed(ActionEvent ae)
                {
                    panel1.setBackground(Color.BLUE);
                }
            });
        setLayout(new GridLayout(1, 1));
        add(button);
    }
}

希望这能帮助你解释你做错了什么。

以下是程序启动时的图像：

AT START

以下是带按钮的第二个标签的图像：

TAB WITH BUTTON ON IT

当您点击tab2的按钮将tab1的背景颜色更改为蓝色时，这是第一个标签的图像：

BACKGROUND COLOR OF TAB1 CHANGED

希望这可以帮助你的努力。

此致

答案 2 :(得分：0)

您不应该创建A的新实例，而是使用选项卡式窗格中包含的A实例。您可以通过在标签窗格中搜索此A个实例来解决此问题，也可以在创建A时将B实例传递给B

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