9.7二维

package nn;public class Nn {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stub int[][] a= new int[20][20]; for(int i=0;i<20;i++){ for(int j=0;j<20;j++){ if((i+j)%2==0||i+j==0){ a[i][j]=0; } else{ a[i][j]=1; } System.out.print(a[i][j]); if(j==19){ System.out.println();} }}}}