Java StringWriter equals()方法及实例

Java.io.StringWriter .equals(Object obj)方法是用来检查StringWriter的两个实例是否相等。它返回一个布尔值，说明它们是否相等。

签名 。

public boolean equals(StringWriter second_StringWriter)

语法

first_StringWriter.equals(second_StringWriter)

参数： 该方法接受一个强制性参数second_StringWriter，它指的是第二个StringWriter与第一个StringWriter的比较。

返回值： 如果相等，并且对象和StringWriter都相等，该方法返回true，否则返回false。

下面的程序用来说明java.io.StringWriter.elements()方法的工作。

程序1 :

// Java code to illustrate the equals() method
  
import java.io.*;
  
public class StringWriter_Demo {
    public static void main(String[] args)
    {
  
        // Creating an empty StringWriter
        StringWriter writer1 = new StringWriter();
  
        // Inserting elements into the StringWriter
        writer1.write("GeeksForGeeks");
  
        // Displaying the StringWriter
        System.out.println("StringWriter 1: "
                           + writer1.toString());
  
        // Creating an empty StringWriter
        StringWriter writer2 = new StringWriter();
  
        // Inserting elements into the StringWriter
        writer2.write("GFG");
  
        // Displaying the StringWriter
        System.out.println("StringWriter 2: "
                           + writer2.toString());
  
        System.out.println("Are both of them equal? "
                           + writer1.equals(writer2));
    }
}

输出:

StringWriter 1: GeeksForGeeks
StringWriter 2: GFG
Are both of them equal? false

程序2 。

// Java code to illustrate the equals() method
  
import java.io.*;
  
public class StringWriter_Demo {
    public static void main(String[] args)
    {
  
        // Creating an empty StringWriter
        StringWriter writer1 = new StringWriter();
  
        // Inserting elements into the StringWriter
        writer1.write("GFG");
  
        // Displaying the StringWriter
        System.out.println("StringWriter 1: "
                           + writer1.toString());
  
        // Creating an empty StringWriter
        StringWriter writer2 = new StringWriter();
  
        // Inserting elements into the StringWriter
        writer2.write("GFG");
  
        // Displaying the StringWriter
        System.out.println("StringWriter 2: "
                           + writer2.toString());
  
        System.out.println("Are both of them equal? "
                           + writer1.equals(writer2));
    }
}

输出:

StringWriter 1: GFG
StringWriter 2: GFG
Are both of them equal? false