请教一个swing线程的问题

下面这段代码是简单模拟我遇到的问题，
分两个线程
线程A显示一个进度条
线程B循环输出数字

点击“开始”以后，我要的效果是进度条在那边滚，同时循环输出，输出结束后再显示一个新框。
而现在的现象是等输出结束后，显示新框，这时候进度条才开始滚。
请教怎么解决这个问题

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JProgressBar;
import javax.swing.SwingUtilities;

public class ProgressSample
{
	static class BarThread extends Thread
	{
		private static int DELAY = 500;
		JProgressBar progressBar;

		public BarThread(JProgressBar bar)
		{
			progressBar = bar;
		}

		public void run()
		{
			int minimum = progressBar.getMinimum();
			int maximum = progressBar.getMaximum();
			Runnable runner = new Runnable()
			{
				public void run()
				{
					int value = progressBar.getValue();
					progressBar.setValue(value + 1);
				}
			};
			for (int i = minimum; i < maximum; i++)
			{
				try
				{
					SwingUtilities.invokeAndWait(runner);
					// Our task for each step is to just sleep
					Thread.sleep(DELAY);
				} catch (InterruptedException ignoredException)
				{
				} catch (InvocationTargetException ignoredException)
				{
				}
			}
		}
	}

	public static void main(String args[])
	{
		// Initialize
		final JProgressBar aJProgressBar = new JProgressBar(0, 100);
		final JButton aJButton = new JButton("Start");
		ActionListener actionListener = new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				aJButton.setEnabled(false);
				Thread stepper = new BarThread(aJProgressBar);
				stepper.start();
				
				whileThread wt = new whileThread();
				wt.start();
				try
				{
					wt.join();
				} catch (InterruptedException e1)
				{
					// TODO 自动生成 catch 块
					e1.printStackTrace();
				}
				JFrame newFrame = new JFrame("&&&&&&&&&&&&&&&&&&&&&&");
				newFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				newFrame.setLocation(500, 400);
				newFrame.setSize(300, 100);
				newFrame.show();
			}
		};
		aJButton.addActionListener(actionListener);
		JFrame theFrame = new JFrame("Progress Bars");
		theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container contentPane = theFrame.getContentPane();
		contentPane.add(aJProgressBar, BorderLayout.NORTH);
		contentPane.add(aJButton, BorderLayout.SOUTH);
		theFrame.setLocation(500, 200);
		theFrame.setSize(300, 100);
		theFrame.show();
	}
	
	
}
class whileThread extends Thread
{
	public void run()
	{
		int i =0;
		while(i < 1000000)
		{
			System.out.println(i++);
		}
	}
}

为什么要加这段呢

try
				{
					wt.join();
				} catch (InterruptedException e1)
				{
					// TODO 自动生成 catch 块
					e1.printStackTrace();
				}

恩，问题就在这段，join之后主线程要等待子线程执行完成才能继续。

try
{
wt.join();
} catch (InterruptedException e1)
{
// TODO 自动生成 catch 块
e1.printStackTrace();
}


加了上面之后。swing线程要等待直到wt线程结束。swing线程不运行，所以状态条就没办法显示了，这个时候界面是僵死的。

LZ现在不能回帖，带LZ回个帖

代LZ发帖

没见过这么用进度条的。。。

把打开新窗口的代码放在字线程里面就好了

package swing.progress;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JProgressBar;
import javax.swing.SwingUtilities;

public class ProgressSample
{
	static class BarThread extends Thread
	{
		private static int DELAY = 500;
		JProgressBar progressBar;

		public BarThread(JProgressBar bar)
		{
			progressBar = bar;
		}

		public void run()
		{
			int minimum = progressBar.getMinimum();
			int maximum = progressBar.getMaximum();
			Runnable runner = new Runnable()
			{
				public void run()
				{
					int value = progressBar.getValue();
					progressBar.setValue(value + 1);
				}
			};
			for (int i = minimum; i < maximum; i++)
			{
				try
				{
					SwingUtilities.invokeAndWait(runner);
					// Our task for each step is to just sleep
					Thread.sleep(DELAY);
				} catch (InterruptedException ignoredException)
				{
				} catch (InvocationTargetException ignoredException)
				{
				}
			}
		}
	}

	public static void main(String args[])
	{
		// Initialize
		final JProgressBar aJProgressBar = new JProgressBar(0, 100);
		final JButton aJButton = new JButton("Start");
		ActionListener actionListener = new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				aJButton.setEnabled(false);
				Thread stepper = new BarThread(aJProgressBar);
				stepper.start();
				
				whileThread wt = new whileThread();
				wt.start();
//				try
//				{
//					wt.join();
//				} catch (InterruptedException e1)
//				{
//					// TODO 自动生成 catch 块
//					e1.printStackTrace();
//				}
			}
		};
		aJButton.addActionListener(actionListener);
		JFrame theFrame = new JFrame("Progress Bars");
		theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		Container contentPane = theFrame.getContentPane();
		contentPane.add(aJProgressBar, BorderLayout.NORTH);
		contentPane.add(aJButton, BorderLayout.SOUTH);
		theFrame.setLocation(500, 200);
		theFrame.setSize(300, 100);
		theFrame.show();
	}
	
	
}
class whileThread extends Thread
{
	public void run()
	{
		int i =0;
		while(i < 1000000)
		{
			System.out.println(i++);
		}
		SwingUtilities.invokeLater(new Runnable() {

			public void run() {
				JFrame newFrame = new JFrame("&&&&&&&&&&&&&&&&&&&&&&");
				newFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				newFrame.setLocation(500, 400);
				newFrame.setSize(300, 100);
				newFrame.show();
			}
		});
	}
}

想复杂了，想复杂了。

在下说过了，这只是对实际问题的一个模拟，打开新窗口的代码不能放在子线程里

在子线程里打开是最直接简单的方法。如果不能在子线程里加代码可以考虑给子线程做个wrapper,把开窗口的代码放在wrapper里面。还有觉得你这个模拟看不懂，进度条的进度没有任何意义