how to change the color of JProgressBar-CodePudding

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

CodePudding user response：

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