In all programs where I use integer.persint error on executing even if program has no error but cmd is showing this I dont udestand what to do ?

Question

1.00/5 (1 vote)

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class SwitchDemo
{
public static void main(String args[])
{
int marks = Integer.parseInt(args[6]);
switch(marks/6)
{
case 1:
case 2:
case 3:
System.out.println("Excelent");
break;

case 4:
System.out.println("Good");
break;

case 5:
System.out.println("Work Hard");
break;

case 6:
System.out.println("Poor");

default :
System.out.println("Invalid value Entered");
}
}
}

What I have tried:

This is he error?

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 6 at SwitchDemo.main(SwitchDemo.java:5)

Posted 12-Feb-17 1:44am

Member 12996155

Updated 12-Feb-17 2:24am

v2

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[no name] 12-Feb-17 8:15am

Obviously you are trying to access an element of an array that doesn't exist. What you should do is stop trying to access an element of an array that doesn't exist and your error will go away.

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Richard MacCutchan · Answer 1 · 2017-02-12T02:22:00

Solution 1

Java

int marks = Integer.parseInt(args[6]);

Are you sure that there is a value at args[6]? You should use the args.length property first, to check how many values are present.

Posted 12-Feb-17 2:22am

Richard MacCutchan

OriginalGriff · Answer 2 · 2017-02-12T02:24:00

The error is pretty explicit:

ArrayIndexOutOfBoundsException: 6 at SwitchDemo.main(SwitchDemo.java:5)

So look at line 5 and you see:

Java

int marks = Integer.parseInt(args[6]);

Did you provide any arguments when you ran the application?
Did you provide seven arguments (remember, java array indexes start at zero, not one, so the sixth argument is at index 5)?

I'd strongly suggest you check the number of arguments passed, and report a problem to the user if he didn't provide enough when he runs your app:

Java

int argCount = args.length;

Will tell you how many were passed.

In all programs where I use integer.persint error on executing even if program has no error but cmd is showing this I dont udestand what to do ?

2 solutions

Solution 1

Solution 2

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