二维数组实例

package java_test;

class java_test{
	
	public static void main(String args[])
	{
		int x = 3, y = 5;
		int i , j;
		int[][] a = new int[x][y]; 
		for( i = 0; i < x; i++){
			a[i][0] = 12345678;
			for( j = 0; j < y; j++){
				System.out.println("a["+i+"]["+j+"]="+a[i][j]);
			}
		}
		int[][] arr = new int[2][];
        arr[0] = new int[3];
        arr[1] = new int[5];
        for( i = 0; i < 2; i++){
			arr[i][0] = 12345678;
		}
        for( i = 0; i < 3; i++){
        	if(i != 0)
        		arr[0][i] = 3;
			System.out.println("arr[0]["+i+"]="+arr[0][i]);
		}
        for( i = 0; i < 5; i++){
        	if(i != 0)
        		arr[1][i] = 5;
			System.out.println("arr[1]["+i+"]="+arr[1][i]);
		}
	}
}