&和和&&在Java？ [英] Difference between & and && in Java?
问题描述
可能重复：
有什么区别|和||在Java？
差异在&和&&
我只是想知道
几天我写了的条件，如果声明看起来像：
I was just wondering what the difference between & and && is?
A few days I wrote a condition for an if statement the looked something like:
if(x < 50 && x > 0)
但是，我将&& 改为& 并且没有显示任何错误。有什么区别？
However, I changed the && to just & and it showed no errors. What's the difference?
示例：我编译了这个简单的程序：
Example: I compiled this simple program:
package anddifferences;
public class Main {
public static void main(String[] args) {
int x = 25;
if(x < 50 && x > 0) {
System.out.println("OK");
}
if(x < 50 & x > 0) {
System.out.println("Yup");
}
}
}
打印OK并且对。那么，如果它们都有效，那么我使用哪一个呢？
It printed "OK" and "Yup". So does it matter which one I use if they both work?
推荐答案
& 是按位的。
&& 是合乎逻辑的。
& is bitwise.
&& is logical.
& 评估操作的两面。
&& 评估操作的左侧，如果它是 true ，它继续并评估右侧。
& evaluates both sides of the operation.
&& evaluates the left side of the operation, if it's true, it continues and evaluates the right side.
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