java 两个方法看起来好像在做同样的事情，但是给予不同，为什么？

xpcnnkqh 于 2023-02-07 发布在 Java

关注(0)|答案(1)|浏览(89)

输入：

-6
1
-5

方法一：

public void setGoalkeepingSkill(int goalkeepingSkill) {
    if (goalkeepingSkill > 5 && goalkeepingSkill < 1) {
        System.out.println("invalid skill value goalkeeping");
        this.goalkeepingSkill = 1;
    } else {
        this.goalkeepingSkill = goalkeepingSkill; 
        System.out.println("Goalkeeping Skill has been set");
    }
}

输出：

Goalkeeping Skill has been set
Goalkeeping Skill has been set
Goalkeeping Skill has been set

方法二：

public void setGoalkeepingSkill(int goalkeepingSkill) {

    if(goalkeepingSkill<=5 && goalkeepingSkill>=1){
        this.goalkeepingSkill = goalkeepingSkill;
        System.out.println("Goalkeeping Skill has been set");
    }else{
        this.goalkeepingSkill=1;
        System.out.println("invalid skill value goalkeeping");
    }
}

输出：

invalid skill value goalkeeping
Goalkeeping Skill has been set
invalid skill value goalkeeping

Java

来源：https://stackoverflow.com/questions/75351630/two-methods-look-like-they-are-doing-the-same-thing-but-give-different-output-w

1条答案

按热度按时间

y4ekin9u1#

在第一种方法中，条件goalkeepingSkill > 5 && goalkeepingSkill < 1总是false，不能同时大于5和小于1，如果要反转第二种方法的条件，需要使用||逻辑运算符，而不是&&：

public void setGoalkeepingSkill(int goalkeepingSkill) {
    if (goalkeepingSkill > 5 || goalkeepingSkill < 1) {
        // Here -------------^
        System.out.println("invalid skill value goalkeeping");
        this.goalkeepingSkill = 1;
    } else {
        this.goalkeepingSkill = goalkeepingSkill; 
        System.out.println("Goalkeeping Skill has been set");
    }
}

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java 两个方法看起来好像在做同样的事情，但是给予不同，为什么？

1条答案

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