Java Multi Dimensions Array - Java Tutorials

Java Multi Dimensions Array - Java Tutorials


 

Ads

Tutorials   
Java final method Assert in Java Final method in java Autoboxing in Java assert In Java JDBC batch insert using Java bean class Java Singleton Pattern Java Collection API - Java Tutorials Stack Overflow - Java Tutorials End of Year Puzzle The link to the outer class,java tutorial,java tutorials Orientating Components Right to Left,java newsletter,java,tutorial Non-virtual Methods in Java - java tutorials Multicasting in Java - java tutorials,tutorial Creation Time Comparison of Multi Dimensional Array- Java Tutorials Making Exceptions Unchecked - java tutorial,java tutorials Making Enumerations Iterable - JDK 5 Example Which is Faster - LinkedList or ArrayList? LinkedHashMap - Java Tutorials HashMap and HashCode JDK 1.4 the NullPointerException - Java Tutorials Java HashMap - Java Tutorials Java GC java awt package tutorial Java Multi Dimensions Array - Java Tutorials Java HashSet  - Java Tutorials Java Field Initialisation - Java Tutorials Java Comments - Java Tutorials J2EE Singleton Pattern - Design Pattern Tutorials Java - JDK Tutorials garbage collection in java Final Methods - Java Tutorials Exceptional Constructors - Java Tutorials Double-checked locking,java tutorials,java tutorial Disassembling Java Classes - Java Tutorials Java Deadlocks - Java Deadlocks Tutorials, Deadlocks in Java Commenting out your code - Java Tutorials Class names don't identify a class - Java Tutorials Causing Deadlocks in Swing Code Exception in Java - Java Tutorials Catching Exceptions in GUI Code - Java Tutorials boolean comparisons - tutorial Interthread Communication in Java BASIC Java - Java Tutorials Thread Deadlocks - Java Tutorials Autoboxing unboxing in Java - Java Tutorials Assertion in Java Appending Strings - Java Tutorials Anonymous Inner Classes - Anonymous Inner Classes tutorial Assertion in java
Ads

Multidimensional Arrays in Java

In java, the grouping of same type of elements for storing under the same name is done using array.An array can hold any type of data and can have multidimensional. For accessing elements of array we use its index.

In other words, we can say that array is the set of same type of data stored under the same roof.

Given below the example to provide you an idea-how array works?

Declaring one dimension array 

type var-name[ ];

For example :

int[] Dev ;

or , you can also declare it as follows :

int Dev[];

If an array is declared as : int Dev[3], it means it has 4 element from Dev[0] to Dev[3].

Allocating memory to arrays :

var-name = new type[size];  

Example :

Dev = new int[12];

Assigning and accessing value from array

You can assign value directly, like this :

Dev[0] = 12; // this will assign value to first element.
Dev[1] = 30  // this will assign value to second element.

Array can also be assigned when they are declared as :

int Dev[] = {3, 12, 21, 30, 39, 48};

You can access array element like this :

System.out.println(Dev[3]);   // This will print 4th element of array.

Example :

public class DevArray {
public static void main(String[] args) {
double[] devList = {1.9, 2.9, 3.4, 3.5};

// Print all the array elements
for (double element: devList) {
System.out.println(element);
}
}
}

Output :

C:\Program Files\Java\jdk1.6.0_18\bin>javac DevArray .java

C:\Program Files\Java\jdk1.6.0_18\bin>java DevArray
1.9
2.9
3.4
3.5

Multidimensional array :

In java, multidimensional arrays are actually arrays of arrays. For example, you can declare a two dimensional array as :

int twoD[][]=new int [4][5];

You can also declare a three dimensional array as :

int threeD[][][]= new int [3][4][5];

Example :

Class TwoDmatrix{
  public static void main(String args[]) {
    int twoDm[][]= new int[4][5];
    int i,j,k=0;

    for(i=0;i<4;i++)
      for(j=0;j<5;j++) {
         twoDm[i][j]=k;
         k++;
      }
    for(i=0;i<4;i++)
      for(j=0;j<5;j++) {
         System.out.println(twoDm[i][j]+"")
         System.out.println();
      }
   }
 }
 

Output :

C:\Program Files\Java\jdk1.6.0_18\bin>javac TwoDmatrix .java

C:\Program Files\Java\jdk1.6.0_18\bin>java TwoDmatrix
0  1  2  3  4
5  6  7  8  9
10 11 12 13 14
15 16 17 18 19

Advertisements

Share on Google+Share on Google+

Java Multi Dimensions Array - Java Tutorials

Posted on: April 18, 2011 If you enjoyed this post then why not add us on Google+? Add us to your Circles

Advertisements

 

Discuss: Java Multi Dimensions Array - Java Tutorials  

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments:2
maharani
July 5, 2012
java

multidimensional array using student marklist program.
Ric
August 30, 2012
Code error

Don't know if you care (this post is pretty old), but your code is incorrect. The correct version of main is: public static void main(String args[]) { int twoDm[][]= new int[4][5]; int i,j,k=0; for(i=0;i<4;i++) for(j=0;j<5;j++) { twoDm[i][j]=k; k++; } for(i=0;i<4;i++){ for(j=0;j<5;j++) System.out.print(twoDm[i][j]+" "); System.out.println(); } }

Ads

 

Ads