Use for-each syntax to output two-dimensional array
package org.fmz.awesome ;
import java.util.* ;
public class ForEachOutputTwoDimensionalArray{
public static void main(String args[]){
int[][] A = new int[10][10] ;
Random random = new Random(25) ;
for(int i=0;i<A.length;i++){
Arrays.fill(A[i], random.nextInt(10)) ;
}
for(int[] i : A){
for(int j: i){
System.out.print(j + "\t") ;
}
System.out.println() ;
}
}
}/* Output:
1 1 1 1 1 1 1 1 1 1
8 8 8 8 8 8 8 8 8 8
7 7 7 7 7 7 7 7 7 7
8 8 8 8 8 8 8 8 8 8
7 7 7 7 7 7 7 7 7 7
8 8 8 8 8 8 8 8 8 8
5 5 5 5 5 5 5 5 5 5
7 7 7 7 7 7 7 7 7 7
6 6 6 6 6 6 6 6 6 6
4 4 4 4 4 4 4 4 4 4
*/
Thinking from Object-Oriented to use this
package org.fmz.learning ;
public class Cal{
int number ;
public Cal(int number){
this.number = number ;
}
public Cal add(int i){
number += i ;
return this ;
}
public static void main(String args[]){
Cal c = new Cal(100).add(1).add(2).add(3).add(4) ;//this is called fluent API
System.out.println(c.number) ;
}
}/* Output:
110
*/
Sometimes we don’t know to use return or void, especially, we can use both. You can return yout kind of Object, which is very convenient, and this can show your understanding of Object-Oriented thinking.
