Moo*_*sez 5 java swing look-and-feel jbutton uimanager
我有一个JButton,我想将背景设置为一种颜色。
JButton button = new JButton();
button.setVisible(true);
button.setPreferredSize(new Dimension(student_scroll.getWidth(), 50));
button.setBorder(BorderFactory.createLineBorder(Color.WHITE, 1));
button.setBackground(Color.BLACK);
button.setForeground(Color.WHITE);
button.setOpaque(true);
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我在Mac上使用了它,并且按我的意愿出现了。但是,在Windows上尝试时,前景为白色(应有),但背景为空。
说添加button.setContentAreaFilled(false);我做了但没有效果的。大多数其他人说添加button.setOpaque(true);我也已经做过的。
我还必须做些什么才能使它显示为黑色背景?
编辑
根据要求,SSCCE:
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class MainSwing extends JFrame {
private static final long serialVersionUID = -8231889836024827530L;
public static void main(String[] args) {
try {
System.setProperty("apple.laf.useScreenMenuBar", "true");
System.setProperty("com.apple.mrj.application.apple.menu.about.name", "Test");
UIManager.put("ScrollBarUI", "main.CustomScrollBarUI");
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch(ClassNotFoundException e) {
System.out.println("ClassNotFoundException: " + e.getMessage());
}
catch(InstantiationException e) {
System.out.println("InstantiationException: " + e.getMessage());
}
catch(IllegalAccessException e) {
System.out.println("IllegalAccessException: " + e.getMessage());
}
catch(UnsupportedLookAndFeelException e) {
System.out.println("UnsupportedLookAndFeelException: " + e.getMessage());
}
SwingUtilities.invokeLater( new Runnable() {
public void run() {
JFrame frame = new JFrame() {
Container c = getContentPane();
JButton button = new JButton("Hello");
{
button.setText("Hello");
button.setVisible(true);
button.setPreferredSize(new Dimension(100, 50));
button.setBorder(BorderFactory.createLineBorder(Color.WHITE, 1));
button.setBackground(Color.BLACK);
button.setForeground(Color.WHITE);
button.setOpaque(true);
c.add(button);
}
};
frame.setSize(500, 500);
frame.setBackground(Color.BLACK);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
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问题似乎与该行有关:UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());当我删除它时,按钮是黑色的。
我从这些UIManager键/值对中猜测,PLAF是基于OS X的Aqua PLAF。这似乎是这里问题的一部分。这里没有Windows上填充的内容区域。
import java.awt.*;
import javax.swing.*;
public class MainSwing extends JFrame {
public static void main(String[] args) {
try {
System.setProperty("apple.laf.useScreenMenuBar", "true");
System.setProperty("com.apple.mrj.application.apple.menu.about.name", "Test");
UIManager.put("ScrollBarUI", "main.CustomScrollBarUI");
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace(); // more info for less LOC!
}
SwingUtilities.invokeLater(new Runnable() {
public void run() {
JFrame frame = new JFrame() {
Container c = getContentPane();
JButton button = new JButton("Hello");
{
c.setLayout(new GridLayout(0,1));
c.add(new JButton("Hi"));
button.setText(UIManager.getSystemLookAndFeelClassName());
button.setVisible(true);
button.setPreferredSize(new Dimension(400, 100));
button.setBorder(BorderFactory.createLineBorder(Color.WHITE, 1));
button.setContentAreaFilled(false);
button.setBackground(Color.BLACK);
button.setForeground(Color.WHITE);
button.setOpaque(true);
c.add(button);
}
};
frame.pack();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
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