查看二維數組中是否存在某個數
package array_2_3;
public class Demo_4 {
public static void main(String[] args) {
int array[][] = {{1, 2, 8, 9}, {2, 4, 9, 12}, {4, 7, 10, 13}, {6, 8, 11, 15}};
Boolean res = Demo_4.isIn(array, 7);
System.out.println(res);
}
public static Boolean isIn(int[][] array,int key){
boolean flag = false;
int row = array.length;
int column = array[0].length;
int rowIndex = 0;
int columnIndex = row - 1;
while (rowIndex < row && columnIndex >= 0){
if (array[rowIndex][columnIndex] == key){
flag = true;
break;
}else if (array[rowIndex][columnIndex] > key){
columnIndex --;
}else {
rowIndex ++;
}
}
return flag;
}
}