Java中的 StringJoiner add() 方法
StringJoiner 的add(CharSequence newElement)将给定 CharSequence 值的副本添加为 StringJoiner 值的下一个元素。如果 newElement 为 null,则添加“null”。
句法:
public StringJoiner add(CharSequence newElement)
参数:此方法需要一个强制参数newElement ,它是要添加的元素。
返回:此方法返回对此 StringJoiner 的引用
下面的程序说明了 add() 方法:
示例 1:演示带分隔符“”的 add()
Java
// Java program to demonstrate
// add() method of StringJoiner
import java.util.StringJoiner;
public class GFG1 {
public static void main(String[] args)
{
// Creating StringJoiner with delimiter " "
StringJoiner str = new StringJoiner(" ");
// Adding elements in the StringJoiner
str.add("Geeks");
str.add("for");
str.add("Geeks");
// Print the StringJoiner
System.out.println(str.toString());
}
}
Java
// Java program to demonstrate
// add() method of StringJoiner
import java.util.StringJoiner;
public class GFG1 {
public static void main(String[] args)
{
// Creating StringJoiner with delimiter ","
StringJoiner str = new StringJoiner(",");
// Adding elements in the StringJoiner
str.add("Geeks");
str.add("for");
str.add("Geeks");
// Print the StringJoiner
System.out.println(str.toString());
}
}
输出:
Geeks for Geeks
示例 2:演示带有分隔符“,”的 add()
Java
// Java program to demonstrate
// add() method of StringJoiner
import java.util.StringJoiner;
public class GFG1 {
public static void main(String[] args)
{
// Creating StringJoiner with delimiter ","
StringJoiner str = new StringJoiner(",");
// Adding elements in the StringJoiner
str.add("Geeks");
str.add("for");
str.add("Geeks");
// Print the StringJoiner
System.out.println(str.toString());
}
}
输出:
Geeks,for,Geeks