为什么此Java枚举代码无法编译？

Question

enum itProfs {  
    private int sal;
    DEVELOPER(30), ANALYST(20); 
    itProfs(int sal){
        this.sal = sal;
    }
    public int getSal(){
        return sal;
    }   
}

What is the reason?

Answer 1

You should put enumeration values first.

enum itProfs {  
    DEVELOPER(30), ANALYST(20); 
    private int sal;
    itProfs(int sal){
        this.sal = sal;
    }
    public int getSal(){
        return sal;
    }   
}