StringBuilder類的length()方法 (StringBuilder Class length() method)

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

  length()方法在java.lang包中可用。

• length() method is used to return the length of this sequence (i.e. it counts the number of characters denoted by this object).

  length()方法用于返回此序列的長度(即，它計算此對象表示的字符數)。

• length() 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.

  length()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• length() method does not throw an exception at the time of returning length.

  length()方法在返回length時不會引發異常。

Syntax:

句法：

public int length();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of this method is int, it returns the counts of the number of characters stored in this object.

此方法的返回類型為int ，它返回存儲在此對象中的字符數的計數。

Example:

例：

// Java program to demonstrate the example // of int length() method of StringBuilder public class Length {public static void main(String[] args) {// Creating an StringBuilder objectStringBuilder st_b = new StringBuilder("Java World ");// Display st_b System.out.println("st_b = " + st_b);// By using length() method is to return the length// of st_b objectint len = st_b.length();// Display st_b lengthSystem.out.println("st_b.length() = " + len);} }

Output

輸出量

st_b = Java World st_b.length() = 11

翻譯自: https://www.includehelp.com/java/stringbuilder-length-method-with-example.aspx

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