Java 中的 StringBuilder 长度()，示例
原文:https://www . geeksforgeeks . org/stringbuilder-length-in-Java-with-examples/
字符串生成器类的 length() 方法返回字符串生成器对象包含的字符数。此方法返回当前由该 StringBuilder 对象表示的字符序列的长度。
语法:
public int length()
返回值:该方法返回 StringBuilder 对象包含的字符序列的长度。
下面的程序演示了 StringBuilder 类的 length()方法:
例 1:
// Java program to demonstrate
// the length() Method.
class GFG {
public static void main(String[] args)
{
// create a StringBuilder object
// with a String pass as parameter
StringBuilder
str
= new StringBuilder("WelcomeGeeks");
// print string
System.out.println("String = "
+ str.toString());
// get length of StringBuilder object
int length = str.length();
// print length
System.out.println("length of String = "
+ length);
}
}
Output:
String = WelcomeGeeks
length of String = 12
例 2:
// Java program to demonstrate
// the length() Method.
class GFG {
public static void main(String[] args)
{
// create a StringBuilder object
// with a String pass as parameter
StringBuilder
str
= new StringBuilder("India is Great");
// print string
System.out.println("String = "
+ str.toString());
// get length of StringBuilder object
int length = str.length();
// print length
System.out.println("length of String = "
+ length);
}
}
Output:
String = India is Great
length of String = 14
参考: https://docs . Oracle . com/javase/10/docs/API/Java/lang/stringbuilder . html # length()
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