Java: for(;;) vs. while(true)

What is the difference between a standard while(true) loop and for(;;)?

Is there any, or will both be mapped to the same bytecode after compiling?

Semantically, they're completely equivalent. It's a matter of taste, but I think while(true) looks cleaner, and is easier to read and understand at first glance. In Java neither of them causes compiler warnings.

At the bytecode level, it might depend on the compiler and the level of optimizations, but in principle the code emitted should be the same.

EDIT:

On my compiler, using the Bytecode Outline plugin,the bytecode for for(;;){} looks like this:

L0LINENUMBER 6 L0FRAME SAMEGOTO L0

And the bytecode for while(true){} looks like this:

L0LINENUMBER 6 L0FRAME SAMEGOTO L0

So yes, at least for me, they're identical.

It's up to you which one to use. Cause they are equals to compiler.

public class Test {public static void main(String[] args) {while (true) {System.out.println("Hi");}} }javac -g:none Test.java rename Test.class Test1.classpublic class Test {public static void main(String[] args) {for (;;) {System.out.println("Hi");}} }# javac -g:none Test.java # mv Test.class Test2.class # diff -s Test1.class Test2.class Files Test1.class and Test2.class are identical

http://stackoverflow.com/questions/8880870/java-for-vs-whiletrue

总结

以上是生活随笔为你收集整理的Java: for(;;) vs. while(true)的全部内容，希望文章能够帮你解决所遇到的问题。

如果觉得生活随笔网站内容还不错，欢迎将生活随笔推荐给好友。