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import java.util.Scanner; class Addition
{
public void Addition()
{
Scanner s = new Scanner(System.in); int a[][] = new int[3][]; int b[][] = new int[3][]; int c[][] = new int[3][]; for(int i=0;i<3;i++)
{
a[i] = new int[3]; b[i] = new int[3];
c[i] = new int[3];
}
System.out.println("Enter the elements of var size array a"); for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
a[i][j] = s.nextInt();
}
}
System.out.println("Enter the elements of var size array b"); for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
b[i][j] = s.nextInt();
}
}
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
c[i][j] = a[i][j]+b[i][j];
}
}
System.out.println("The resultant matrix is: "); for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
System.out.print(c[i][j]+" ");
}
System.out.println();
}
}
}
public class AdditionTest
{
public static void main(String args[])
{
Addition a = new Addition();
a.Addition();
}
}
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoYou can use java.util.ArrayList, which is similar to an array but will grow in size as you add items to it. ArrayList
String is the data type, you can use other things, such as Integer.
The number 4 at the end is the initial size of the ArrayList (it will grow as you add elements), if you leave it blank it will default to 10. You can add items: arrayName.add("Hello");
Add items to a specific spot: arrayName.add(2, "Hello");
Delete items: arrayName.remove(2, "Hello");
Get items: arrayName.get(2) The great thing about adding and deleting is that it will shift all of the other items to the left or right, so you won't have blank holes in the array. You can add something right into the middle of the array, it won't overwrite what's there, it will shift items to the right to make room for the new item.
There is also more which you can find here: http://java.sun.com/javase/6/docs/api/
Just find "ArrayList" in the left panel.
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