Syntax error on token "1", Identifier expected in Enum Java - java-8

Question

I want to implement Enum for Number, I want to get its respective String values. I already followed link: http://www.makeinjava.com/convert-enum-integer-string-value-java/.
The error which I'm getting is
Syntax error on token "1", Identifier expected
Syntax error on token "2", Identifier expected
public enum CompanyCityType {
1("New York"),
2("Reston");
private Integer companyCityType;
CompanyCityType(Integer companyCityType) {
this.companyCityType = companyCityType;
}
public Integer getCompanyAddrType() {
return this.companyCityType;
}
}

Answer 1

You cannot begin any identifier name in Java with a number, it must follow the rules as specified for having a valid variable name in Java.
As per the Oracle variable tutorial:
Variable names are case-sensitive. A variable's name can be any legal
identifier — an unlimited-length sequence of Unicode letters and
digits, beginning with a letter, the dollar sign "$", or the
underscore character "_".
As the fields in an enum are actually public static final fields (singleton instances) or class variables they follow the same set of naming rules as a normal Java variable.
You need to refactor your code to:
public enum CompanyCityType {
NEW_YORK(1),
RESTON(2);
private int companyCityType;
CompanyCityType(int companyCityType) {
this.companyCityType = companyCityType;
}
public int getCompanyAddrType() {
return this.companyCityType;
}
}