Java 字符串连接()带示例
java.lang.string.join() 方法用分隔符连接给定的元素，并返回连接的字符串。请注意，如果元素为空，则添加空。从 JDK 1.8 开始，java 字符串中就包含了 join() 方法。 Java 字符串中有两种类型的 join() 方法。 语法:
public static String **join**(CharSequence deli, CharSequence... ele)
and
public static String join
(CharSequence deli, Iterable<? extends CharSequence> ele)
Parameters:
deli- delimiter to be attached with each element
ele- string or char to be attached with delimiter
Returns : 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
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