java - 用 if 语句指向程序中的特定行？ java

Question

我有一个程序要求用户输入 1 到 6 之间的值。但是，如果他们不询问该范围内的值，我希望程序要求用户再次输入。我在该方法中有其他代码，所以我不能只指向该方法。

System.out.print("Now enter a number between 1 and 6 ");
        dieNumber = keyboard.nextInt();

        if (dieNumber == 1){        
            drawOne(pane);  }   
        else if (dieNumber == 2){
            drawTwo(pane);  }
        else if (dieNumber == 3){
            drawThree(pane);}
        else if (dieNumber == 4){
            drawFour(pane); }
        else if (dieNumber == 5){
            drawFive(pane); }
        else if (dieNumber == 6){
            drawSix(pane); }

Answer 1

只需创建 while 循环，以便在每次用户输入大于 6 的数字时再次询问

System.out.print("Now enter a number between 1 and 6 ");
		
		dieNumber = keyboard.nextInt();
		while (dieNumber > 6){
			System.out.print("Now enter a number between 1 and 6 ");
			dieNumber = keyboard.nextInt();
		}
		if (dieNumber == 1){		
			drawOne(pane);	}	
		else if (dieNumber == 2){
			drawTwo(pane);	}
		else if (dieNumber == 3){
			drawThree(pane);	}
		else if (dieNumber == 4){
			drawFour(pane);	}
		else if (dieNumber == 5){
			drawFive(pane);	}
		else if (dieNumber == 6){
			drawSix(pane); }