Question

我正在为这个项目工作一个小时，我仍然无法找到解决方案。我总是得到同样的错误（EnigmaEncrypt.java:44：错误：不兼容的类型：从float到char的可能有损转换 char e = exampleCharInput; ^ 1错误）这是我的代码：

 import java.util.Scanner;



// Created by ab38 on 2015-12-01.

public class EnigmaEncrypt {

     // Static Scanner field

    private static Scanner scan;

    /**
     * Get a char from the command line.
     *
     * @return the first char of the current line, typed by the user
     * on the command line.
     */
    private static char getChar() {
        return scan.next().charAt(0);
    }

    /**
     * Get an integer from the command line.
     *
     * @return the integer on the current line, typed by the user
     * on the command line.
     */
    private static int getInt() {
        return scan.nextInt();
    }

    public static void main(String[] args) {
        scan = new Scanner(System.in);

        // Example: How to get an integer from the command line:
        System.out.println("Enter an integer:");
        int exampleIntInput = getInt();
        System.out.println("Rotorposition: " + exampleIntInput);


        // Example: How to get a single char from the command line:
        System.out.println("Enter a single character:");
        float exampleCharInput = getChar() + exampleIntInput;
        char e = exampleCharInput;

        System.out.println("Char from command line: " + e);


    }
}

Answer 1

char以2字节存储，浮动4字节。你试图在不进行投射的情况下将浮点数放入char中。试试这个

function loadProductActionCreator(dispatch) {
  dispatch({
    type: 'load_product',
  })
  fetch('api/product').then(
    function (r) {
      return r.json();
    }
  )
  .then(function (res) {
    dispatch({
      type: 'loaded_product',
      data: res
    })
  })
}

错误：不兼容的类型可能有损转换从float到char

1 个答案: