java数组2d循环超出范围

Question

我是Java新手

我的循环数组超出了范围。我觉得我的代码很好

有人能帮我吗

String[][] seats = new String[5][3];

for(int r = 1; r <= seats.length; r++){
        System.out.printf(r+ "." );

        for (int c = 1; c <= seats[r].length; c++){
            System.out.print("  0");
        }

        System.out.println("");
    }

Answer 1

数组从键0开始，在数组结束。长度-1

String[][] seats = new String[5][3];

for(int r = 0; r < seats.length; r++){
        System.out.printf(r+ "." );

        for (int c = 1; c <= seats[r].length; c++){
            System.out.print("  0");
        }

        System.out.println("");
    }

Answer 2

Java数组索引是基于0的，所以它从0到0。长度-1。替换<；=与<；应该做

Answer 3

java中的数组是基于零的。因此，循环必须从索引0开始，结束位置低于数组。长度for(int r = 0; r < seats.length; r++){

String[][] seats = new String[5][3];

for(int r = 0; r < seats.length; r++){
        System.out.printf(r+ "." );

        for (int c = 0; c < seats[r].length; c++){
            System.out.print("  0");
        }

        System.out.println("");
    }