if else语句中的死分支 [英] Dead branch in if else statement

问题描述

我正在编写这段代码，你给程序命名。

I'm writing this code where you give the the program a name.

Java告诉我语句中的else永远不会被使用如果变量isACoolGuy为false，则使用。

Java is telling me that the else in the statement is never used when it should be used if the variable "isACoolGuy" is false.

if (isACoolGuy = true){
        System.out.println("Thank you for this name... "+ name);
    }else if(isACoolGuy = false){    
        System.out.println("Okay im changing my name since you are an idiot");
        name = name = "jack";
        System.out.println("My name is "+ name + " now");

之前有一个switch语句应该将isACoolGuy布尔值更改为false。

There is a switch statement earlier that should change the "isACoolGuy" Boolean to false.

case "name":
            System.out.println("You are an a******");
            isACoolGuy = false;
            break;

推荐答案

你的错误

if (isACoolGuy == true){
        System.out.println("Thank you for this name... "+ name);
    }else if(isACoolGuy == false){
        System.out.println("Okay im changing my name since you are an idiot");
        name = "jack";
        System.out.println("My name is "+ name + " now");

或更好

if (isACoolGuy){
        System.out.println("Thank you for this name... "+ name);
    }else if(!isACoolGuy){
        System.out.println("Okay im changing my name since you are an idiot");
        name =  "jack";
        System.out.println("My name is "+ name + " now");

在你的情况下最正确的方法是跳过else if并将其替换为其他类似的这个

and the most correct way in your case is to skip the else if and replace it with single else like this

if (isACoolGuy){
        System.out.println("Thank you for this name... "+ name);
    }else {
        System.out.println("Okay im changing my name since you are an idiot");
        name =  "jack";
        System.out.println("My name is "+ name + " now");

一些理论

isACoolGuy = true表示为isACoolGuy变量赋值true。
在if中使用它总是返回true
isACoolGuy == true检查变量isACoolGuy是否具有真值。
它的比较

isACoolGuy= true means assign true value to isACoolGuy variable . Using it inside an if always returns true isACoolGuy == true checks if the variable isACoolGuy has true value. It's comparation

在if中你可以跳过比较布尔值，因为if有以下格式

Inside an if you can skip comparing boolean values since if has the following format

if(true)
{

}

所以If（isACoolGuy）类似于if（isACoolGuy == true）

so If(isACoolGuy) is similar to if(isACoolGuy==true)

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