java switch底层

Java中的switch语句可以用if/else语句来代替。switch语句底层的实现原理是通过跳转指令来实现条件分支。具体来说，当程序执行到switch语句时，首先会将需要匹配的表达式的值与每个case语句中的值进行比较，如果匹配成功，则执行对应case语句下的代码块，然后通过无条件跳转到switch语句的结束位置。如果所有的case语句都不匹配，则执行default语句下的代码块，然后同样通过无条件跳转到switch语句的结束位置。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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