wrt to java Array programming

[RaviNada Kiran]

I had always difficulties with Arrays .

int a[] = {1,2,3,4,5,6,7,8};

How can i copy the above array a[] data into a new array b[]

int b[] = new int[a.length];

Please help waiting for your responses

[Balu Sadhasivam]

Wont the for loop works well ? just iterate the length of array and grab each index values and assign it to new array

[John de Michele]

This will work, too:

int[] b = Arrays.copyOf(a, a.length);

John.

[Balu Sadhasivam]

John de Michele wrote:This will work, too:

int[] b = Arrays.copyOf(a, a.length);

John.

Arrays.copyOf is available from Java 6.0.

[Henry Wong]

Another option is to use the arraycopy() method of the java.lang.System class.

Henry

[Campbell Ritchie]

Another option is to use the clone() method of the array. It will work nicely for a plain simple 1-subscript array like that.

int[] b = a.clone();

By the way: write int[] a rather than int a[]. That asserts that the type of a is int[] not int.

[RaviNada Kiran]

Thanks for your time , But i dont want to do it any operation with the help of java.util.Arrays.

[RaviNada Kiran]

int a[] = {1,2,3};
int b[] = new int[a.length];

for(int i=0;i<a.length;i++)
{
a[i]= b[i];
}
System.out.println(b[2]);


i am getting 0 , can anybody please tell me whats the correct approach to copy data from one array to another??

[Henry Wong]

i am getting 0 , can anybody please tell me whats the correct approach to copy data from one array to another??

Generally, when copying a source to a target, it is a good idea to put the target on the left side of the assignment.

Henry

[RaviNada Kiran]

Thanks a lot Henry the code is working fine.