问题描述
我正在尝试编译并收到此错误:
I am trying to compile and I get this error:
enigma/Rotor.java:30: incompatible types found : java.lang.String required: int switch(name){ 1 error
为什么会出现此错误?我如何解决它?它在包装中,我似乎无法弄清楚.代码如下:
Why am I getting this error? How do I fix it? It's in the package and I can't seem to figure it out. Here's the code:
String label; Rotor(){;} Rotor(String name){ switch(name){ case "B": conversion_chart = B; break; case "C": conversion_chart = C; break; case "I": conversion_chart=I; notch = NOTCH[0]; break; case "II": conversion_chart=II; notch = NOTCH[1]; break; case "III": conversion_chart=III; notch = NOTCH[2]; break; case "IV": conversion_chart=IV; notch = NOTCH[3]; break; case "V": conversion_chart=V; notch = NOTCH[4]; break; case "VI": conversion_chart=VI; notch = NOTCH[5]; break; case "VII": notch = NOTCH[6]; conversion_chart=VII; break; case "VIII": notch = NOTCH[7]; conversion_chart=VIII; break; } label = name; position = 0; }
推荐答案
switch(name)
switch 语句仅从 Java7 开始支持.
switch statement with String is supported from Java7 onwards only.
我猜你使用的编译器版本低于Java7
I guess the compiler version you are using is less than Java7
选项:
- 您需要升级到 Java7
- 将 switch 语句更改为 if/else
- 在 switch 中使用 int 而不是 String