开关执行所有的case语句 [英] Switch executes all case statements

问题描述

有人能解释我为什么我的循环从0到7？我只需要在前3个例子中，但程序正在通过所有..代码是在show（）方法。

 <$ （brojac = 0; brojac <3; brojac ++）{
 
 switch（brojac）{
 case 1：
 figura1.setPosition（pomx [random]， pomy [随机]）; 
 stage.addActor（figura1）; 
 System.out.println（1）; 
案例2：
 figura2.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura2）; 
 System.out.println（2）; 
案例3：
 figura3.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura3）; 
 System.out.println（3）; 
案例4：
 figura4.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura4）; 
 System.out.println（4）; 
案例5：
 figura5.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura5）; 
 System.out.println（5）; 
案例6：
 figura6.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura6）; 
 System.out.println（6）; 
案例7：
 figura7.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura7）; 
 System.out.println（7）; 
 
 
 $ b $ / code $ / $ p 
 
解决方案
因为休息时间不见了。在每种情况下，你需要break关键字。有关详细说明，请参阅切换语句java教程 
 
 $ b例如
 
 pre $  for（brojac = 0; brojac <3; brojac ++）{
 
 switch（brojac）{
 case 1：
 figura1.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura1）; 
 System.out.println（1）; 
 break; /// Break here 
 
 case 2：
 figura2.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura2）; 
 System.out.println（2）; 
 break; ///这里打破
案例3：
 figura3.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura3）; 
 System.out.println（3）; 
 break; /// Break here 
 case 4：
 figura4.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura4）; 
 System.out.println（4）; 
 break; ///打破这里
情况5：
 figura5.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura5）; 
 System.out.println（5）; 
 break; ///这里打破
案例6：
 figura6.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura6）; 
 System.out.println（6）; 
 break; ///打破这里
案例7：
 figura7.setPosition（pomx [random]，pomy [random]）; 
 stage.addActor（figura7）; 
 System.out.println（7）; 
 break; /// Break here 
 
 
 code $ 
 
 
其他情况将会是如果以上情况之一被评估为真，则执行。
 
Can someone explain me why my loop is going from 0 to 7? I need to get only in the first 3 cases, but the program is going through all.. The code is in the show() method.
for(brojac=0; brojac<3; brojac++){

    switch(brojac){
    case 1:
        figura1.setPosition(pomx[random], pomy[random]);
        stage.addActor(figura1);
        System.out.println("1");
    case 2:
        figura2.setPosition(pomx[random], pomy[random]);
        stage.addActor(figura2);
        System.out.println("2");
    case 3:
        figura3.setPosition(pomx[random], pomy[random]);
        stage.addActor(figura3);
        System.out.println("3");
    case 4:
        figura4.setPosition(pomx[random], pomy[random]);
        stage.addActor(figura4);
        System.out.println("4");
    case 5:
        figura5.setPosition(pomx[random], pomy[random]);
        stage.addActor(figura5);
        System.out.println("5");
    case 6:
        figura6.setPosition(pomx[random], pomy[random]);
        stage.addActor(figura6);
        System.out.println("6");
    case 7:
        figura7.setPosition(pomx[random], pomy[random]);
        stage.addActor(figura7);
        System.out.println("7");

    }
}

解决方案
Because the break is missing. After every case you need the break keyword. For a detailed explanation see switch statement java tutorial

e.g.
for(brojac=0; brojac<3; brojac++){

switch(brojac){
case 1:
    figura1.setPosition(pomx[random], pomy[random]);
    stage.addActor(figura1);
    System.out.println("1");
    break; /// Break here

case 2:
    figura2.setPosition(pomx[random], pomy[random]);
    stage.addActor(figura2);
    System.out.println("2");
    break; /// Break here
case 3:
    figura3.setPosition(pomx[random], pomy[random]);
    stage.addActor(figura3);
    System.out.println("3");
    break; /// Break here
case 4:
    figura4.setPosition(pomx[random], pomy[random]);
    stage.addActor(figura4);
    System.out.println("4");
    break; /// Break here
case 5:
    figura5.setPosition(pomx[random], pomy[random]);
    stage.addActor(figura5);
    System.out.println("5");
    break; /// Break here
case 6:
    figura6.setPosition(pomx[random], pomy[random]);
    stage.addActor(figura6);
    System.out.println("6");
    break; /// Break here
case 7:
    figura7.setPosition(pomx[random], pomy[random]);
    stage.addActor(figura7);
    System.out.println("7");
    break; /// Break here
}
}
Otherwise the other cases will be executed if one of the above cases gets evaluated to true.

                        
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