Java String length()

本文概述

• Java String length()方法示例
• Java String length()方法示例2

java字符串的length()方法的字符串长度。它返回字符总数的计数。 Java字符串的长度与字符串的Unicode代码单元相同。

内部实施

public int length() {
        return value.length;
    }

签名

字符串length()方法的签名如下：

public int length()

指定者

CharSequence接口

退货

字符长度

Java String length()方法示例

public class LengthExample{
public static void main(String args[]){
String s1="srcmini";
String s2="python";
System.out.println("string length is: "+s1.length());//10 is the length of srcmini string
System.out.println("string length is: "+s2.length());//6 is the length of python string
}}

立即测试

string length is: 10
string length is: 6

Java String length()方法示例2

public class LengthExample2 {
	public static void main(String[] args) {
		String str = "srcmini";
		if(str.length()>0) {
			System.out.println("String is not empty and length is: "+str.length());
		}
		str = "";
		if(str.length()==0) {
			System.out.println("String is empty now: "+str.length());
		}
	}
}

String is not empty and length is: 10
String is empty now: 0