按键监听--不冲突

[java]代码库

package s1214键盘监听事件移动方块;
//w,a,s,d控制移动
import java.awt.Graphics;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import 工具类.ThreadSleep;

public class Main1214 extends JFrame
{
  static int x=50;
  static int y=50;
  static int speed=10;
  static boolean upFlag=false;
  static boolean downFlag=false;
  static boolean leftFlag=false;
  static boolean rightFlag=false;

	public static void  main(String[] args)
	{  
		
		Main1214 a= new Main1214();

		while(true)
		{
		 ThreadSleep.threadSleep(30);			   
		  if(upFlag)    {y-=speed;}//向上移动
		  if(downFlag)  {y+=speed;}//向下移动
		  if(leftFlag)  {x-=speed;}//向左移动		
		  if(rightFlag) {x+=speed;}//向右移动
       	  a.repaint();//重绘
		}		
	}
		
	Main1214()
	{  
	   this.setTitle("移动滑块");        //设置窗体标题
	   this.setDefaultCloseOperation(3);//设置窗体关闭方式
	   this.setSize(700,700);           //设置窗体大小
	   this.setResizable(true);         //设置窗体大笑可变
	   this.setLocationRelativeTo(null);//设置窗体居中		      
	   JPanel drawPanel=new JPanel()    //创建画板对象,用来画图	 
		  {	    	  
		     public void paint(Graphics g)                
		    {
			 super.paint(g);
			 g.fillRect(x,y,30,30);      //画出方块
		    }
          };	   
          
	   this.addKeyListener(new KeyAdapter()     //匿名对象和匿名内部类的使用
	    { 
		    	  
//关键代码**************************************************************************
			      public void keyPressed(KeyEvent e) //按下按键
			      {
				    if(e.getKeyCode()==KeyEvent.VK_W){upFlag=true;}		    
				    if(e.getKeyCode()==KeyEvent.VK_S){downFlag=true;}
				    if(e.getKeyCode()==KeyEvent.VK_A){leftFlag=true;}
				    if(e.getKeyCode()==KeyEvent.VK_D){rightFlag=true;}   
			      }	    	
			      
			      public void keyReleased(KeyEvent e)//松开按键
			      {
			    	if(e.getKeyCode()==KeyEvent.VK_W){upFlag=false;}		    
					if(e.getKeyCode()==KeyEvent.VK_S){downFlag=false;}
					if(e.getKeyCode()==KeyEvent.VK_A){leftFlag=false;}
					if(e.getKeyCode()==KeyEvent.VK_D){rightFlag=false;} 		    	  
			      }
//关键代码**************************************************************************			      
	      
		      });

		      this.add(drawPanel);   //将画板添加到窗体
		      this.setVisible(true); //设置窗体可见
		}
	}