StringBuilder类trimToSize()方法 (StringBuilder Class trimToSize() method)

• trimToSize() method is available in java.lang package.

  trimToSize()方法在java.lang包中可用。

• trimToSize() method is used to minimize storage used for the characters (i.e. if the initial buffer size is greater than required to hold its current set of characters so it may be resized depend on the requirement to utilize memory space effectively).

  trimToSize()方法用于最小化用于字符的存储(即，如果初始缓冲区大小大于保存其当前字符集所需的大小，则可以根据有效利用内存空间的要求来调整大小)。

• trimToSize() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  trimToSize()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• trimToSize() method does not throw an exception at the time of trimming size.

  trimToSize()方法在修剪大小时不会引发异常。

Syntax:

句法：

    public void trimToSize();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of this method is void, it returns nothing.

此方法的返回类型为void ，不返回任何内容。

Example:

例：

// Java program to demonstrate the example 
// of void trimToSize() method of StringBuilder 
public class TrimToSize {
public static void main(String[] args) {
// Creating an StringBuilder object
StringBuilder st_b = new StringBuilder("Java ");
// By using append() method is to append the given string to 
// st_b object
st_b.append("World");
// By using trimToSize() method is to trim the st_b object
// according to particular stringBuilder object size
st_b.trimToSize();
// Display st_b
System.out.println("st_b.trimToSize() = " + st_b);
}
}

Output

输出量

st_b.trimToSize() = Java World

翻译自: https://www.includehelp.com/java/stringbuilder-trimtosize-method-with-example.aspx