Java StringBuilder toString（）方法与示例

StringBuilder类的toString()方法 (StringBuilder Class toString() method)

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

  toString()方法在java.lang包中可用。

• toString() method is used to represent string denoted by this object (when we create a new string object so first it is created and instantiated to contain the data[set of characters] denoted by this object currently).

  toString()方法用于表示此对象表示的字符串(当我们创建一个新的字符串对象时，首先创建并实例化它包含当前由该对象表示的data [字符集])。

• toString() 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.

  toString()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。

• toString() method does not throw an exception at the time of string representation.

  toString()方法在字符串表示时不会引发异常。

Syntax:

句法：

    public String toString();

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 String, it returns the string denotation of this set of characters represented by this object.

此方法的返回类型为String ，它返回此对象表示的这组字符的字符串表示形式。

Example:

例：

// Java program to demonstrate the example 
// of String toString() method of StringBuilder 
 
public class ToString {
    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 toString() method is to represent st_b
        // object to String
        System.out.println("st_b.toString() = " + st_b.toString());
    }
}

Output

输出量

st_b.toString() = Java World

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