本文介绍了三元运算符不工作的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
Netbeans说我的三元运算符不是声明。怎么会?
Netbeans is saying that my ternary operator isn't a statement. How come?
int direction;
direction = (Math.random() < 0.5) ? 0 : 1; // direction is either L or R (0 or 1)
direction == 0 ? System.out.print('L') : System.out.print('R');
我试过if / then / else对应它并且运行正常:
I tried it's if/then/else counterpart and it works fine:
int direction;
direction = (Math.random() < 0.5) ? 0 : 1; // direction is either L or R (0 or 1)
if(direction == 0){
System.out.print('L');
} else {
System.out.print('R');
}
推荐答案
三元运算符中的语句需要是无效的。他们需要返回一些东西。
The statements in the ternary operator need to be non-void. They need to return something.
System.out.println(direction == 0 ? 'L' : 'R');
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