枚举简单用法

public class Test {
  public enum Mj {
    U1, U2, U3

  }
  public void doWhat(Mj  chooseMj){
    switch ( chooseMj) {
    case  U1 :
      System.out.println("java基础");
      break;
    case  U2 :
      System.out.println("java进阶");
      break;
    case  U3 :
      System.out.println("javawb");
      break;
    default:
      break;
    }
    
  }
  public static void main(String[] args) {
    Test test=new Test();
    test.doWhat( Mj.U1);
  }
  
  
}