如何改变JProgressBar的颜色

发布于 2025-01-19 02:32:44 字数 572 浏览 3 评论 0原文

1我试图更改进度条的颜色，但它保持橙色，这是代码：

test(){  
        UIManager.put("ProgressBar.background", Color.BLACK);
        UIManager.put("ProgressBar.foreground", Color.RED);
        UIManager.put("ProgressBar.selectionBackground", Color.YELLOW);
        UIManager.put("ProgressBar.selectionForeground", Color.BLUE);
        
          
         bar = new JProgressBar();
         bar.setBounds(20, 30,400 , 200);
         bar.setString("Welcome...");
         bar.setStringPainted(true);
         this.add(bar);

我尝试了.setBackground，它也无法正常工作

原文

1 I am trying to change the color of the progress bar but it stays orange here's the code:

test(){  
        UIManager.put("ProgressBar.background", Color.BLACK);
        UIManager.put("ProgressBar.foreground", Color.RED);
        UIManager.put("ProgressBar.selectionBackground", Color.YELLOW);
        UIManager.put("ProgressBar.selectionForeground", Color.BLUE);
        
          
         bar = new JProgressBar();
         bar.setBounds(20, 30,400 , 200);
         bar.setString("Welcome...");
         bar.setStringPainted(true);
         this.add(bar);

I've tried .setbackground it also didnt work

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千纸鹤 2025-01-26 02:32:46

您的代码问题可能与您调用 UIManager 的位置有关。
如果在对象初始化之前调用它，它会正常工作：

UIManager.put("ProgressBar.background", Color.GREEN);
UIManager.put("ProgressBar.foreground", Color.BLUE);
UIManager.put("ProgressBar.selectionBackground", Color.RED);
UIManager.put("ProgressBar.selectionForeground", Color.GREEN);

JProgressBar progress = new JProgressBar();

结果：

，如果您在初始化后调用 UIManager，结果将会有所不同：

JProgressBar progress = new JProgressBar();

UIManager.put("ProgressBar.background", Color.GREEN);
UIManager.put("ProgressBar.foreground", Color.BLUE);
UIManager.put("ProgressBar.selectionBackground", Color.RED);
UIManager.put("ProgressBar.selectionForeground", Color.GREEN);

结果：
在此处输入图像描述 ]2

the problem with your code might relate to the location which you called UIManager.
if you call it before object initialization it works correctly:

UIManager.put("ProgressBar.background", Color.GREEN);
UIManager.put("ProgressBar.foreground", Color.BLUE);
UIManager.put("ProgressBar.selectionBackground", Color.RED);
UIManager.put("ProgressBar.selectionForeground", Color.GREEN);

JProgressBar progress = new JProgressBar();

result:

and if you call UIManager after initialization the result will differ:

JProgressBar progress = new JProgressBar();

UIManager.put("ProgressBar.background", Color.GREEN);
UIManager.put("ProgressBar.foreground", Color.BLUE);
UIManager.put("ProgressBar.selectionBackground", Color.RED);
UIManager.put("ProgressBar.selectionForeground", Color.GREEN);

result:
enter image description here ]2

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