Character.isHighSurrogate() method in Java with examples

The java.lang.Character.isHighSurrogate() is a inbuilt method in java which determines if the given char value is a Unicode high-surrogate code unit (also known as leading-surrogate code unit). Such values do not represent characters by themselves but are used in the representation of supplementary characters in the UTF-16 encoding.

Syntax:

public static boolean isHighSurrogate(char ch)

Parameters: The function accepts a single mandatory parameter ch which specifies the value to be tested.

Return Value: The function returns a boolean value. The value returned is True if the char value is between MIN_HIGH_SURROGATE and MAX_HIGH_SURROGATE inclusive, False otherwise.

Below programs illustrate the Character.isHighSurrogate() method:



Program 1:

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// Java program to illustrate the
// Character.isHighSurrogate() method
import java.lang.*;
  
public class gfg {
  
    public static void main(String[] args)
    {
  
        // create 2 char primitives c1, c2
        char c1 = '\u0a4f', c2 = '\ud8b4';
  
        // assign isHighSurrogate results of
        // c1, c2 to boolean primitives bool1, bool2
        boolean bool1 = Character.isHighSurrogate(c1);
        System.out.println("c1 is a Unicode"+
        "high-surrogate code unit ? " + bool1);
  
        boolean bool2 = Character.isHighSurrogate(c2);
        System.out.println("c2 is a Unicode"
        "high-surrogate code unit ? " + bool2);
    }
}

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Output:

c1 is a Unicodehigh-surrogate code unit ? false
c2 is a Unicodehigh-surrogate code unit ? true

Program 2:

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// Java program to illustrate the
// Character.isHighSurrogate() method
import java.lang.*;
  
public class gfg {
  
    public static void main(String[] args)
    {
  
        // create 2 char primitives c1, c2
        char c1 = '\u0b9f', c2 = '\ud5d5';
  
        // assign isHighSurrogate results of
        // c1, c2 to boolean primitives bool1, bool2
        boolean bool1 = Character.isHighSurrogate(c1);
        System.out.println("c1 is a Unicode"
        "high-surrogate code unit ? " + bool1);
  
        boolean bool2 = Character.isHighSurrogate(c2);
        System.out.println("c2 is a Unicode"
        "high-surrogate code unit ? " + bool2);
    }
}

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Output:

c1 is a Unicodehigh-surrogate code unit ? false
c2 is a Unicodehigh-surrogate code unit ? false

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