Program : To implement and demonstrate user defined Exception.

Algorithm

Step 1: Start
Step 2: create class IllegalMarkException extends Exception
Step 3: create class markprocess
Step 4: Read mm
Step 5: markprocess p=new markprocess()
Step 6: p.validate(mm)
Step 7: p.result(mm)
Step 8: stop

Function validate(int mark)

Step 1: Start
Step 2: if(mark=40) go to 2 else to 4
Step 3: str=”PASS” go to 5
Step 4: str=”FAIL”
Step 5: print “you have”,str,” ED the exam”
Step 6: exit

Program

import java.io.*;

class IllegalMarkException extends Exception
{
    	private int mark;
   	 IllegalMarkException(int m)
	{
    		mark=m;
	}
	public String toString()
	{
		return ("Illegal Mark : " + mark );
	}
}

class MarkProcess
{
	String str;
	void Validate(int mark) throws  IllegalMarkException
	{
		if(mark=40)
			str="PASSED";
		else
			str="FAILED";
		return(str);
	}	
}

public class MyMarkList
{
	public static void main(String args[])
	{
		int reg[],mark[];
		int i,n;
		String result;
		DataInputStream in=new DataInputStream(System.in);
		MarkProcess m=new MarkProcess();
		try
		{
			System.out.println("Enter number of candidates : ");
			n=Integer.parseInt(in.readLine());
			reg=new int[n]; 
			mark=new int[n]; 
			System.out.println("Enter "+ n +" register numbers :");
			for(i=0;i
Output
Enter number of candidates :

6

Enter 6 register numbers :

101

102

103

104

105

106

Enter 6 marks :

25

95

-9

0

55

-2

Reg No:		Mark	Result

-------------------------------

101		25	FAILED

102		95	PASSED

103		-9	Exception :Illegal Mark : -9

104		0	FAILED

105		55	PASSED

106		-2	Exception :Illegal Mark : -2
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