java 命令行中显示进度信息

class ShowGra implements Runnable
{
	private int percent;
	public ShowGra(int per)
	{
		 = per;
	}
	public void run(){
		int i;
		for(int j=0;j<30;j++)
			("\b");
		for(i=0;i<percent/5;i++)
		{
			("=");
		}
		int blanks = 25-i;
		for(int k=0;k<blanks;k++)
			(" ");
		("%3d%%",percent);
	}
}

public class Test
{
	public Test()
	{
	}
	
	public static void main(String[] args)
	{
		int per = 0;
		while(per<=100){
		Runnable run2 = new ShowGra(per);
		Thread thread2 = new Thread(run2);
		();
		try{
			(1000);
		}catch(Exception e)
		{
			;
		}
		finally{
			per+=5;
		}

		}		
	}
}