java - 定义和使用二维数组的语法错误

Question

public class PennyPitch {
  
  int total = 0;
  int[][] board = {{1,1,1,1,1}, {1,2,2,2,1}, {1,2,3,2,1}, {1,2,2,2,1}, {1,1,1,1,1}};
  String[][] boardWithP = {{"1", "1", "1", "1", "1"}, {"1", "2", "2", "2", "1"}, {"1", "2", "3", "2", "1"}, {"1", "2", "2", "2", "1"}, {"1", "1", "1", "1", "1"}};
  
  for(int i = 0; i < 4; i = i + 0){
    int x = (int)(Math.random() * 5);
    int y = (int)(Math.random() * 5);
    
    if(boardWithP[x][y] != "P"){
      total += board[x][y];
      boardWithP[x][y] = "P";
      i++;
    }
  }
}

所以我不断收到语法错误

Syntax error on token ";", { expected after this token

在第 8 行和

Syntax error, insert "}" to complete ClassBody

在线，我想知道是否有人知道问题出在哪里。我所有的括号似乎都匹配，据我所知，第 8 行应该有一个分号。有什么建议么？

标签： javamultidimensional-arraysyntax-error

Answer 1

您需要将代码放在方法（函数）中，如下所示：

public class PennyPitch {
  public static void main(String[] args) {
     int total = 0;
     int[][] board = {{1,1,1,1,1}, {1,2,2,2,1}, {1,2,3,2,1}, {1,2,2,2,1}, {1,1,1,1,1}};
     String[][] boardWithP = {{"1", "1", "1", "1", "1"}, {"1", "2", "2", "2", "1"}, {"1", "2", 
      "3", "2", "1"}, {"1", "2", "2", "2", "1"}, {"1", "1", "1", "1", "1"}};
  
    for(int i = 0; i < 4; i = i + 0){
       int x = (int)(Math.random() * 5);
       int y = (int)(Math.random() * 5);
    
       if(boardWithP[x][y] != "P"){
          total += board[x][y];
         boardWithP[x][y] = "P";
         i++;
      }
    }
  } 
}