java - 收到 Java 无法访问代码

Question

已关闭。这个问题是 not reproducible or was caused by typos 。目前不接受答案。

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这个问题是由拼写错误或无法再重现的问题引起的。虽然类似的问题可能是 on-topic在这里，这个问题的解决方式不太可能帮助 future 的读者。

已关闭 8 年前。

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我在输入此代码时收到无法访问的代码错误。我不知道为什么，是因为我这个 If 语句中没有 Else 吗？

import java.util.InputMismatchException;
import java.util.Scanner;

public class pickNumbers {
    Scanner readInput = new Scanner(System.in);

    float[] pickNumbers(int choice) {
        float[] myFloats = new float[2];
        do { // do loop will continue until user enters correct response
            System.out.print("Please enter 2 numbers separated by a space in the formats of floats: "); // will prompt user to enter 2 floats
            try {
                myFloats[0] = readInput.nextFloat(); // will read first float entered
                myFloats[1] = readInput.nextFloat(); // will read second float entered
                if (choice == 4 && myFloats[1] == 0.0f)
                    ;
                {
                    System.out.println("Cannot complete calculation. Cannot divide by 0, please try again.");
                    myFloats[0] = myFloats[1] = 0.0f;
                    continue;
                }
                break; // i am receiving an error here saying unreachable code and i don't know why

            } catch (final InputMismatchException e) {
                System.out.println("You have entered an invalid input. Try again.");
                readInput.nextLine(); // discard input that is not a float
                continue; // loop will continue until the correct answer is found
            }
        } while (true);
        return myFloats; // an an unreachable error here also
    }
}

Answer 1

看看你的 if 语句，它有一个分号不合适，应该是:

if (choice == 4 && myFloats[1] == 0.0f) {