Three ways to define arrays in Java

Method One:

1. Declare 2. Allocate space 3. Assignment

　　　

 Public class arr{    publicstaticvoid  main (string[] args) {        int[] arr;    //Declare first        arr=new int[5];  //Allocated space        for (int i=0;i<5;i++) arr[i]=i*10;  //Assigned value         for (int i=0;i<5;i++) {            System.out.println ("arr[" +i+ "]=" +arr[i]);     }}}

Results:

　　

Method Two:

1. Declaring and allocating space 2. Assignment

 Public class arr{    publicstaticvoid  main (string[] args) {        int [] arr=new int[5];    //Declare and allocate space        for (int i=0;i<5;i++) arr[i]=i*10;    //Assigned value         for (int i=0;i<5;i++) {            System.out.println ("arr[" +i+ "]=" +Arr[i]    ); }}}

The result is ibid.

Method Three:

1. Declare and allocate space then. Assign a value

 Public class arr{    publicstaticvoid  main (string[] args) {        //  Declare and allocate space    then. Assignment   int[] arr= new []{20,68,34,22,34};

 for (int i=0;i<5;i++) {System.out.println ("arr[" +i+ "]=" +

Results:

Three ways to define arrays in Java