Question

我正在尝试掌握一个基本的Java概念，但我无法弄清楚为什么我的方法没有被执行。如果它有超过3个字符，我想从单词bunny打印出substring，否则打印出原始字符串。我的代码：

package com.company;

public class Main {

    static String bunny = "bunny";

    public static String subStringBunny(String bunny) {
        if (bunny.length() > 3) {
            bunny = bunny.substring(2, 4);
        }
        return bunny;
    }

    public static void main(String[] args) {
        System.out.println("this is substring from bunny: " + bunny);
    }
}

它仍会打印原始字符串，因此我认为subStringBunny方法不会被执行。任何帮助将不胜感激！谢谢！

Answer 1

您没有从subStringBunny方法调用main方法。这段代码应该做你想要实现的目标：

package com.company;
public class Main {    
    static String bunny = "bunny";    
    public static String subStringBunny (String bunny) {
        if (bunny.length() > 3) {
            bunny =  bunny.substring(2,4);
        }    
        return bunny;
    }

    public static void main(String[] args) {    
        System.out.println("this is substring from bunny: " + Main.subStringBunny(bunny));
    }
}

Answer 2

您没有调用该方法。你最多这样做：

System.out.println("this is substring from bunny: " + subStringBunny(bunny));

方法未执行

2 个答案: