错误处理会停止程序，但是我希望程序继续在 Java 中循环

Question

我有一个可以运行并捕获错误的程序，但是我希望它完成循环而不是在捕获错误时停止。

public class myClass {

    int[] table;

    int size;

    public myClass(int size) {

        this.size = size;

        table = new int[size];

    }

    public static void main(String[] args) {

        int[] sizes = {5, 3, -2, 2, 6, -4};

        myClass testInst;

        try {

            for (int i = 0; i < 6; i++) {

                testInst = new myClass(sizes[i]);

                System.out.println("New example size " + testInst.size);

            }

        }catch (NegativeArraySizeException e) {

            System.out.println("Must not be a negative.");

        }

    }

}

当数组大小为负时会发生错误，但是我如何继续完成循环？

Answer 1

但是我希望让它完成循环而不是在错误被捕获时停止。好的。然后将try和移动catch 到循环中。for (int i = 0; i < 6; i++) {&nbsp; &nbsp; try {&nbsp; &nbsp; &nbsp; &nbsp; testInst = new myClass(sizes[i]);&nbsp; &nbsp; &nbsp; &nbsp; System.out.println("New example size " + testInst.size);&nbsp; &nbsp; } catch (NegativeArraySizeException e) {&nbsp; &nbsp; &nbsp; &nbsp; System.out.println("Must not be a negative.");&nbsp; &nbsp; }}

Answer 2

首先指定程序中的位置可以抛出异常。其次指定如何处理异常，例如指定您要抛出该异常还是只写日志并继续执行。第三，您指定何时处理异常。在您的代码中，try-catch 可以在构造函数中，也可以在循环和下面的代码中，以达到您的目标。testInst = new myClass(sizes[i]);

Answer 3

只需将 try-catch 块放入循环中即可。这样，如果抛出错误，您可以处理它并继续循环。这是代码：&nbsp; &nbsp; public class myClass {&nbsp; &nbsp; int[] table;&nbsp; &nbsp; int size;&nbsp; &nbsp; public myClass(int size) {&nbsp; &nbsp; &nbsp; &nbsp; this.size = size;&nbsp; &nbsp; &nbsp; &nbsp; table = new int[size];&nbsp; &nbsp; }&nbsp; &nbsp; public static void main(String[] args) {&nbsp; &nbsp; &nbsp; &nbsp; int[] sizes = {5, 3, -2, 2, 6, -4};&nbsp; &nbsp; &nbsp; &nbsp; myClass testInst;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; for (int i = 0; i < 6; i++) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; try {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; testInst = new myClass(sizes[i]);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; System.out.println("New example size " + testInst.size);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; } catch(NegativeArraySizeException e) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; System.out.println("Must not be a negative.");&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; continue;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }}