按鍵時按下打印文字

Question

任何人都可以幫助我嗎？

public class DemoTest { 

public static void main(String[] args) { 
    keyPressed(); 
} 

public static void keyPressed() { 
    //If player presses the key 1 then print the line: 
    System.out.println("You pressed the key 1"); 
} 

} 

現在我想按某個鍵打印出來。

Answer 1

嘗試的幾行代碼：

public class DemoTest implements KeyListener{ 
    @Override 
    public void keyPressed(KeyEvent e) { 
     if (e.getKeyCode() == KeyEvent.VK_1) { 
     ..... 
     } 

    } 

Answer 2

這應該工作：

public class DemoTest { 

    Scanner input = new Scanner(System.in); 

    public static void main(String[] args) { 
     keyPressed(); 
    } 

    public static void keyPressed() { 
     //If player presses the key 1 then print the line: 
     int x; 
     try { 
      x = input.nextInt(); 
      if (x==1) 
       System.out.println("You pressed the key 1"); 
     } catch (Exception e) { 
      System.out.println("You haven't entered a number!!!"); 
     } 

    } 

} 

的try-catch塊只是爲了確保玩家將輸入的數字。