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Character.isHighSurrogate() method in Java with examples

Character.isHighSurrogate() method in Java with examples

Last Updated : 06 Dec, 2018

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: Java
// 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);
    }
}
Output:
c1 is a Unicodehigh-surrogate code unit ? false
c2 is a Unicodehigh-surrogate code unit ? true
Program 2: Java
// 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);
    }
}
Output:
c1 is a Unicodehigh-surrogate code unit ? false
c2 is a Unicodehigh-surrogate code unit ? false


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