Custom Exceptions in Java (standard)

Custom "Invalid name exception"

1. Compile-time exception, directly inherit exception

2. Run-time exception, directly inherit RuntimeException

public class illegalnameexception extends exception{//compile-time exception//public class  illegalnameexception extends runtimeexception{//run-time exception         Public illegalexception () {    }    public illegalexception ( string msg) {        super (msg);     }}// Defines a consumer class Public class customerservice{    public void register (string  name) throws illegalexception{        if (Name.length () <6) {            //exception              //Creating Exception Objects              illegalexception e=new illegalexception ("User name length cannot be less than six bits");             throw e;            //throw  Illegalexception ("User name length cannot be less than six bits");        }         //If executed here, the user name is legal.         system.out.println ("User name is valid, registration is successful!") ");     }}//test class public class test{    public static  Void main (String[] args) {        string name= "Nihao";         customerservice cs=new customerservice ();         try{        cs.register (" Nihao ");         }catch (illegalnameexception e) {              system.out.println (E.getMessage ());         }            }} 

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Custom Exceptions in Java (standard)