I am getting array index out of bound exception though I have intialized the array with proper size

Question

1.00/5 (1 vote)

See more:

public class Test {
	public static void main(String[] args)
	{
		int[] a={10,20,80,40,50};
		int[] b={10,20,80,40,50};
		int[] c=new int[a.length+b.length];
		int x=0;
		for(int i=0;i<=a.length-1;i++)
		{
			c[x++]=a[i];
		}
		
		for(int j=0;j<=b.length;j++)
		{
			c[x++]=b[j];
		}
		
		for(int k=0;k<=c.length-1; k++)
		{
			System.out.println(c[k]);
		}
	}

}

What I have tried:

I am trying to merge 2 arrays and store in different array, but I am getting array index out of bound exception though I have intialized the array with proper size

Posted 11-Aug-19 3:56am

radhikay

Updated 11-Aug-19 5:20am

Add a Solution

2 solutions

Solution 2

Java

for(int i=0;i<=a.length-1;i++)

Rather than adding a '-1' to the end condition of a loop, common usage is to use strictly lower operator.

Java

for(int i=0; i<a.length; i++)

Quote:
I am getting array index out of bound exception though I have initialized the array with proper size

When you don't understand why your code fail, the debugger will show you the exact condition of fail.

There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]

http://docs.oracle.com/javase/7/docs/technotes/tools/windows/jdb.html[^]
https://www.jetbrains.com/idea/help/debugging-your-first-java-application.html[^]

The debugger is here to only show you what your code is doing and your task is to compare with what it should do.

Posted 11-Aug-19 5:21am

Patrice T

Updated 11-Aug-19 5:34am

v2

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

RickZeeland · Accepted Answer · 2019-08-11T04:13:00

Solution 1

It must be:

for(int j=0;j<=b.length-1;j++)

Posted 11-Aug-19 4:13am

RickZeeland