Customizing a simple instance of an exception class template _java

One: Custom exception classes:

Package custom exception; 
 
or Inherit RuntimeException (Run-time exception) public 
class MyException extends Exception { 
 
  private static final long Serialversionuid = 1L; 
 
  Provides constructor methods with no parameters public 
  myexception () { 
  } 
 
  //provides a parameterized constructor public 
  myexception (String message) { 
    Super (message);/A passes parameters to the Throwable constructor with string parameters 
   
 

Two: write a test score of the method class: This inside is thrown a write their own exception class

Package custom exception; 
 
public class Checkscore { 
 
  //Check score legality method check () If you define a Run-time exception, you do not have to throw an exception. Public 
  void Check (int score) throws myexception {///throws its own exception class 
    if (Score > | | | | Score < 0) { 
      //score is illegal when throwing an exception 
      throw new MyException ("score is not valid, cent Number should be between 0--120 ");/new one's own exception class 
    } else { 
      System.out.println (" The score is valid, your score is "+ score) 
    ; 
  } 
} 

Three: write a test score, if there are exceptions, to capture, do not throw out the

Package custom exception; 
 
Import Java.util.Scanner; 
 * * Custom Exception Test class/* 
 public 
class Student {public 
  static void Main (string[] args) { 
    Scanner sc = new Sca Nner (system.in); 
    int score = Sc.nextint (); 
 
    Checkscore check = new Checkscore (); 
    try { 
      Check.check (score); 
    } catch (MyException e) {//catch exception E.printstacktrace () with its own exception class 
      ; 
  } 
 

The above is a small series for everyone to customize an exception class template Simple example of all the content, I hope that we support cloud Habitat Community ~