Java中的StringJoiner length()方法
StringJoiner 的length()用于找出 StringJoiner 的长度(以字符为单位)。它返回此 StringJoiner 的字符串表示形式的长度。请注意,如果未调用任何 add 方法,则将返回字符串表示的长度(前缀 + 后缀或空值)。该值应等同于 toString().length()。
句法:
public int length()
返回:该方法返回StringJoiner当前值的长度
下面的程序说明了 length() 方法:
示例 1:演示带有分隔符“”的 length()
Java
// Java program to demonstrate
// length() method of StringJoiner
import java.util.StringJoiner;
public class GFG {
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("StringJoiner: "
+ str.toString());
// Printing the length of str
// using length() method
System.out.println(str.length());
}
}
Java
// Java program to demonstrate
// length() method of StringJoiner
import java.util.StringJoiner;
public class GFG {
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");
str.add("A");
str.add("Computer");
str.add("Portal");
// Print the StringJoiner
System.out.println("StringJoiner: "
+ str.toString());
// Printing the length of str
// using length() method
System.out.println(str.length());
}
}
输出:
StringJoiner: Geeks for Geeks
15
示例 2:使用分隔符“,”来演示 length()
Java
// Java program to demonstrate
// length() method of StringJoiner
import java.util.StringJoiner;
public class GFG {
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");
str.add("A");
str.add("Computer");
str.add("Portal");
// Print the StringJoiner
System.out.println("StringJoiner: "
+ str.toString());
// Printing the length of str
// using length() method
System.out.println(str.length());
}
}
输出:
StringJoiner: Geeks, for, Geeks, A, Computer, Portal
38