array in java

array in java :: futureX

In java,array is an object. Array in C & C++ is static but in Java it is dynamic.

1D Array:


Declaration:

datatype  []var = new datatype[size];
                      OR
datatype[]  var = new datatype[size];
                      OR
datatype  var[] = new datatype[size]; 

Example:


class A{
public static void main(String[] args){
int a[]=new int[5];
a[0]=11;
a[2]=33;
a[4]=1;

for(int i=0;i<a.length;i++)
System.out.println(a[i]);
}
}

Output:(default value is zero)

11

0

33

0

1

Q: Write a program to find minimum from the Array?

class A{

static void printmin(int arr[]){

int min=arr[0];

for(int i=1;i<arr.length;i++)

{

if(min>arr[i])

min=arr[i];

}

System.out.println("min is ::" +min);

}

public static void main(String[] args){

int a[]=new int[5];

a[0]=12;

a[1]=1;

a[2]=22;

a[3]=5;

a[4]=32;

printmin(a);

}}

2D Array:

Declaration:

datatype[][]  var = new datatype[size][size];
                      OR
datatype  [][]var = new datatype[size][size];
                      OR
datatype var[][] = new datatype[size][size];
                      OR
datatype  []var[] = new datatype[size][size];

Example:


class A{
public static void main(String args[]){
int a[][]=new int[3][3];
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++){
a[i][j]=i+j;
System.out.println(a[i][j]+" ");
}
System.out.println();
}}}

Anonymous Array:
JAVA feature of array. 
In normal array, as int a[]={} same array can't declared twice. 

class A{
static void printarray(int arr[]){
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i]);
}
}
public static void main(String args[]){
printarray(new int[]{14,5,5,8});
printarray(new int[]{14,3,8,8});
}}

                                             JAVA TUTORIALS HOMEPAGE