Switch Statement gives Incompatible Types error

Question

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

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;
}

Answer 1

switch(name)

switch statement with String is supported from Java7 onwards only.

I guess the compiler version you are using is less than Java7

Options:

1. You need to either upgrade to Java7
2. Change switch statement to if/else
3. Use int in switch instead of String

Answer 2

If you're using maven then change build in pom as following else change JDK version as 1.8+

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
        <source>1.8</source>
        <target>1.8</target>
    </configuration>
</plugin>