Java.lang.Character.Subset Class in Java

Last Updated : 13 Sep, 2023

Character.Subset Class represents particular subsets of the Unicode(standards using hexadecimal values to express characters - 16bit) character set. The subset, it defines in Character set is UnicodeBlock. Declaration :

public static class Character.Subset
   extends Object

Constructors :

protected Character.Subset(String str) : Constructs new subset instance.

Methods:

equals() : java.lang.Character.Subset.equals() tells whether the two Subset Object are equal or not. Syntax :

public final boolean equals(Object o)
Parameters : 
o : object to be compare with.
Return  :
true : if o equals argumented object, else false.

hashCode() : java.lang.Character.Subset.hashCode() returns the hashCode value of the Subset.. Syntax :
```
public final int hashCode()
Parameters : 
---
Return  :
hashCode of the argumented object.
```

toString(): java.lang.Character.Subset.toString() returns name of the Subset. Syntax :

public final String toString()
Parameters : 
---
Return  :
string representation of the argumented object.

Java

// Java Program illustrating the use of Character.Subset class Methods.

import java.lang.*;

public class CharacterSubsetDemo extends Character.Subset 
{
   CharacterSubsetDemo(String s) 
   {
      // Use of super keyword : 
      // Invokes immediate parent class constructor.
      super(s); 
   }

   public static void main(String[] args) 
   {
      // Initializing two Subsets.
      CharacterSubsetDemo a = new CharacterSubsetDemo("geeks");
      CharacterSubsetDemo b = new CharacterSubsetDemo("for");

      // use of equals() : 
      boolean check2 = a.equals(a);
      System.out.println("Is a equals a ? : " + check2);
      check2 = b.equals(a);
      System.out.println("Is b equals a ? : " + check2);
      System.out.println();
      
      // Use of hashCode() : 
      int check1 = a.hashCode();
      System.out.println("hashCode " + a + " : " + check1);
      check1 = b.hashCode();
      System.out.println("hashCode " + b + " : " + check1);
      System.out.println();
      
      // Use of toString() : 
      System.out.println("a : " + a.toString());
      System.out.println("b : " + b.toString());
   }
}

Output :

Is a equals a ? : true
Is b equals a ? : false

hashCode geeks : 366712642
hashCode for : 1829164700

a : geeks
b : for

Note : lang.Character.Subset Class inherits others methods from java.lang.Object class. For details about java.lang.Object, refer : Object class in Java.