Java String join()用法及代码示例

java.lang.string.join()方法使用定界符将给定元素连接起来并返回连接的字符串。请注意，如果元素为null，则将添加null。自JDK 1.8开始，java字符串中包含join()方法。 java字符串中有两种类型的join()方法。句法：

public static String join(CharSequence deli, CharSequence... ele)  
and  
public static String join
(CharSequence deli, Iterable<? extends CharSequence> ele)     
参数：
deli- delimiter to be attached with each element 
ele- string or char to be attached with delimiter
返回： string joined with delimiter.

// Java program to demonstrate 
// working of join() method 
  
class Gfg1 { 
    public static void main(String args[]) 
    { 
        // delimiter is "<" and elements are "Four", "Five", "Six", "Seven" 
        String gfg1 = String.join(" < ", "Four", "Five", "Six", "Seven"); 
  
        System.out.println(gfg1); 
    } 
}

输出：

Four < Five < Six < Seven

// Java program to demonstrate 
// working of join() method 
  
class Gfg2 { 
    public static void main(String args[]) 
    { 
        // delimiter is "  " and elements are "My", 
        // "name", "is", "Niraj", "Pandey" 
        String gfg2 = String.join("  ", "My", "name", "is", "Niraj", "Pandey"); 
  
        System.out.println(gfg2); 
    } 
}

输出：

My name is Niraj Pandey

// Java program to demonstrate 
// working of join() method 
  
class Gfg3 { 
    public static void main(String args[]) 
    { 
        // delimiter is "->" and elements are "Wake up",  
        // "Eat", "Play", "Sleep", "Wake up" 
  
        String gfg3 = String.join("-> ", "Wake up", "Eat", 
                      "Play", "Sleep", "Wake up"); 
  
        System.out.println(gfg3); 
    } 
}

输出：

Wake up-> Eat-> Play-> Sleep-> Wake up

相关用法

注：本文由纯净天空筛选整理自Niraj_Pandey大神的英文原创作品 Java String join() with examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。