猜随机数的小程序

 if(evt.getSource()==jButton1){
         number=(int)(Math.random()*100)+1;   
         jTextField2.setText(Integer.toHexString(number));
         jLabel4.setText(Integer.toHexString(number));
     }
    if(evt.getSource()==jButton2){
         try{ int guess=Integer.parseInt(jTextField1.getText());
         if(guess==number){
             jLabel1.setText("恭喜你猜对了！");
         }
         else if(guess<number){
             jLabel1.setText("猜小了！");
         }
          else if(guess>number){
             jLabel1.setText("猜大了！");
         }
         }
         catch(NumberFormatException event){
             jLabel1.setText("请输入数字字符");
         }
     }