题解 | #岛屿数量#
岛屿数量
https://www.nowcoder.com/practice/0c9664d1554e466aa107d899418e814e
import java.util.*;
public class Solution {
/**
* 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
*
* 判断岛屿数量
* @param grid char字符型二维数组
* @return int整型
*/
public int solve (char[][] grid) {
// write code here
int count = 0;
for(int i=0;i<grid.length;i++){
for(int j=0;j<grid[0].length;j++){
if(grid[i][j]=='1'){
count++;
dfs(grid,i,j);
}
}
}
return count;
}
public void dfs(char[][] grid,int i,int j){
if(i<0 || j<0 || i>=grid.length || j>=grid[0].length){
return;
}
if(grid[i][j] == '1'){
grid[i][j] = '0';
dfs(grid,i-1,j);
dfs(grid,i+1,j);
dfs(grid,i,j+1);
dfs(grid,i,j-1);
}
return;
}
}
