Java arrays index out of bounds esception

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code that should create files with names as specified by array Names, however the error is

"Esception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 5
at inout.ArrayWriteFiles.main(ArrayWriteFiles.java:30)"

public class ArrayWriteFiles 
{      

public static void main(String[] args) throws IOException
{         
        String[] Names = new String[5]; 
        Names[0] = "Android";
        Names[1] = "java";
        Names[2] = "computerscience";
        Names[3] = "satellite";
        Names[4] = "communication";        
  for(int i=0 ; i<=Names.length ; i++){
  String fileName = "name" + Names[i] + ".html";
  PrintWriter printer = new PrintWriter(fileName, "UTF-8");   
  printer.write("Java is object oriented"); 			
  printer.close();
  }
}
}

What I have tried:

changed code and searched java classes

Posted 7-May-18 0:14am

four systems

Updated 7-May-18 0:39am

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2 solutions

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GKP1992 · Accepted Answer · 2018-05-07T00:28:00

Solution 1

The condition in your for loop is

JavaScript

i<=Names.length;

Here Names.length evaluates to 5 to for the last iteration you try to access the element at array index 5 which is not possible for an array of length 5.

Try changing the condition to

JavaScript

i < Names.length;

Posted 7-May-18 0:28am

GKP1992

Updated 7-May-18 0:29am

v2

Comments

CPallini 7-May-18 6:34am

5.

GKP1992 7-May-18 6:38am

TY.

four systems 8-May-18 6:58am

wow, the esception is gone but the code did not create any files,

CPallini · Accepted Answer · 2018-05-07T00:41:00

Solution 2

GKP1992 already gave you the correct answer.
However, please note, you may also write the loop this way (see The for Statement - The Java Tutorials - Learning the Java Language - Language Basics [^])

Java

for(String name : Names)
{
  String fileName = "name" + name + ".html";
  //...
}

Posted 7-May-18 0:41am

CPallini

Comments

four systems 9-May-18 7:39am

wonderful, another way for file creation

four systems 9-May-18 7:40am

ty