Switch执行所有case语句
有人能解释我为什么我的循环从0到7? 我只需要在前3个案例中获得,但程序正在全部进行..代码在show()方法中。
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"); } }
因为缺少rest时间。 在每种情况下,您都需要break关键字。 有关详细说明,请参阅switch语句java教程
例如
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 } }
否则,如果上述案例之一被评估为真,则将执行其他案例。
这就是Java的switch
语句的工作原理。
一旦其中一个匹配,他们就会“摔倒”。 你需要添加break;
在你所有的情况下。
for(brojac=0; brojac<3; brojac++){ switch(brojac){ case 1: figura1.setPosition(pomx[random], pomy[random]); stage.addActor(figura1); System.out.println("1"); break; case 2: figura2.setPosition(pomx[random], pomy[random]); stage.addActor(figura2); System.out.println("2"); break; case 3: figura3.setPosition(pomx[random], pomy[random]); stage.addActor(figura3); System.out.println("3"); break; case 4: figura4.setPosition(pomx[random], pomy[random]); stage.addActor(figura4); System.out.println("4"); break; case 5: figura5.setPosition(pomx[random], pomy[random]); stage.addActor(figura5); System.out.println("5"); break; case 6: figura6.setPosition(pomx[random], pomy[random]); stage.addActor(figura6); System.out.println("6"); break; case 7: figura7.setPosition(pomx[random], pomy[random]); stage.addActor(figura7); System.out.println("7"); break; } }