java - 带有数组的标记存在语法错误

Question

我是 Java 编码新手。我正在尝试编写一个程序来计算数字 13 的前 400 个倍数并将它们存储在一个整数数组中。我找不到为什么这个类有两个错误，我认为我没有犯错误..有人可以帮忙吗？第一个错误(这一行有三个错误)位于

System.out.println("the first 400 multiples of 13:" );

Syntax error on token ";", { expected after this token
Syntax error on token ""the first 400 multiples of 13:"", delete this token
Syntax error on token(s), misplaced construct(s)

第二个在最后一个 }

上面写着:

Syntax error, insert "}" to complete ClassBody

public class multiples_of_13 {
 int[] thirteens = new int[400];
 int numFound = 0;
 // candidate: the number that might be a multiple
 // of 13
 int candidate = 1;

 System.out.println("the first 400 multiples of 13:" );

 while (numFound < 400) {
     if (candidate % 13 == 0) {
         thirteens[numFound] = candidate;
         numFound++;
     }
     candidate++;
 }
 System.out.println("First 400 multiples of 13:");
 for (int i = 0; i < 400; i++) {
    System.out.print(thirteens[i] + " ");
 }
}

Answer 1

您需要将代码放入 main 方法中，因为它是程序的入口。

就此而言，指令不允许在类的主体内，但在其方法或 block 之一内。

<小时/>

解决方案

public class multiples_of_13 {
    public static void main(String[] args) {
        int[] thirteens = new int[400];
        int numFound = 0;
        // candidate: the number that might be a multiple
        // of 13
        int candidate = 1;

        System.out.println("the first 400 multiples of 13:" );

        while (numFound < 400) {
            if (candidate % 13 == 0) {
                thirteens[numFound] = candidate;
                numFound++;
            }
            candidate++;
        }
        System.out.println("First 400 multiples of 13:");
        for (int i = 0; i < 400; i++) {
            System.out.print(thirteens[i] + " ");
        }
    }
}