有JDK和JRE8但仍然不能使用带字符串的开关

Question

Switch statements with strings were introduced in JDK 7 and I have JDK 8 and JRE 8 but when I attempt to use a switch statement with strings I get the following error:

Exception in thread "main" java.lang.Error: Unresolved compilation problem:

Cannot switch on a value of type String for source level below 1.7. Only convertible int values or enum variables are permitted

What should I do?

Answer 1

Which IDE are u using? I just give you some hint for Eclipse. Right click your project and found properties, switch to Java Compiler tab, make sure the compilation level is set to java 7 or above. I hope you are not using some last decade Eclipse because compilation level is bound to the Eclipse you use, not the JDK.