Java String length()
字符串的
java String length()方法长度。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。
内部实现
public int length() {
return value.length;
}
签名
String length()方法的签名如下:
指定
CharSequence接口
返回
字符长度
Java字符串length()方法示例
public class LengthExample{
public static void main(String args[]){
String s1="lidihuo";
String s2="python";
System.out.println("string length is: "+s1.length());
System.out.println("string length is: "+s2.length());
}
}
string length is: 7
string length is: 6
Java字符串length()方法示例2
public class LengthExample2 {
public static void main(String[] args) {
String str = "lidihuo";
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: 7
String is empty now: 0
