exception handling - Java - Why java.lang.RuntimeException or sub-class of it do not force us to write code in try/catch -

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• why don't have add try-catch runtimeexception? 7 answers

why java.lang.runtimeexception (or sub-class of it) not force write code in try/catch

provided:

java.lang.exception or sub-class of (termed checked-exception) forces write code in try/catch block or forces handle it.

then why java.lang.runtimeexception or sub-class (termed unchecked-exception) not force write code in try/catch block if extending java.lang.exception

added example:

public class exceptiontest {     public static void main(string[] args)     {         // how compiler come know or decide method throwing runtimeexception or exception (keep in mind java.lang.runtimeexception again extending java.lang.exception)          new exceptiontest().test_1();     }      public void test_1() throws myexception     {      } }  class myruntimeruntimeexception extends runtimeexception {     public myruntimeruntimeexception() {         // todo auto-generated constructor stub     } }  class myexception extends exception {     public myexception() {         // todo auto-generated constructor stub     } } 

this part of design o java language. runtimeexceptions intended exceptions represents errors on behalf of programmer , called unchecked exceptions. other exceptions checked exceptions , intent programmers should have handle them explicitly either catching them or declaring them throws declaration on method call let callers know thrown.