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Java Character isWhitespace() Method

The isWhitespace(char ch) method of Character class determines whether the given character(Unicode code point) is a whitespace character or not.

A character in Java can be considered as a whitespace character if one of the following criteria is satisfied:

The character is a Unicode space character (either a SPACE_SEPARATOR, or a LINE_SEPARATOR, or a PARAGRAPH_SEPARATOR) but it must not be a non-breaking space.
The character must be a HORIZONTAL TABULATION.
The character must be a LINE FEED.
The character must be a VERTICAL TABULATION.
The character must be a FORM FEED.
The character must be a CARRIAGE RETURN.
The character must be a FILE SEPARATOR.
The character must be a GROUP SEPARATOR.
The character must be a RECORD SEPARATOR.
The character must be a UNIT SEPARATOR.

Syntax

Parameter

The above method requires only one parameter:

a.)The character that needs to be tested.

Return Value

The isWhitespace(char ch) method returns a Boolean value, i.e., true if the given(or specified) character is a Java white space character. Otherwise, this method returns false.

Example 1

public class JavaCharacterisWhitespaceExample1 {
    public static void main(String[] args) {
        // Create three char primitives:ch1, ch2 and ch3
        char ch1, ch2, ch3
                ;
        // Assign the values to the char primitives.
        ch1 = '\n';
        ch2 = 'f';
        ch3 = '\b';
        
        //Create three boolean primitives.
        boolean b1, b2, b3;
       b1 =  Character.isWhitespace(ch1);
       b2 =  Character.isWhitespace(ch2);
       b3 =  Character.isWhitespace(ch3);
      System.out.println("The first character is a white space character :"+b1);
      System.out.println("The second character is a white space character :"+b2);
      System.out.println("The third character is a white space character :"+b3);
   }
}

Output:

The first character is a white space character :true
The second character is a white space character :false
The third character is a white space character :false

Example 2

public class JavaCharacterisWhitespaceExample2 {
    public static void main(String[] args) {
        // Create three char primitives:ch1, ch2 and ch3
        char ch1, ch2, ch3;	
                
        // Assign the values to the char primitives.
        ch1 = '\t';
        ch2 = ' ';
        ch3 = '\b';
        
        //Create three boolean primitives.
        boolean b1, b2, b3;
       b1 =  Character.isWhitespace(ch1);
       b2 =  Character.isWhitespace(ch2);
       b3 =  Character.isWhitespace(ch3);
      System.out.println("The first character is a white space character :"+b1);
      System.out.println("The second character is a white space character :"+b2);
      System.out.println("The third character is a white space character :"+b3);
   }
}

Output:

The first character is a white space character :true
The second character is a white space character :true
The third character is a white space character :false

Java Character isWhitespace() Method

The isWhitespace(int codePoint) method of Character class determines whether the given(or specified) character is a whitespace character or not.

A character in Java can be considered as a whitespace character if one of the following criteria is satisfied:

The character is a Unicode space character (either a SPACE_SEPARATOR, or a LINE_SEPARATOR, or a PARAGRAPH_SEPARATOR) but it must not be a non-breaking space.
The character must be a HORIZONTAL TABULATION.
The character must be a LINE FEED.
The character must be a VERTICAL TABULATION.
The character must be a FORM FEED.
The character must be a CARRIAGE RETURN.
The character must be a FILE SEPARATOR.
The character must be a GROUP SEPARATOR.
The character must be a RECORD SEPARATOR.
The character must be a UNIT SEPARATOR.

Syntax

Parameter

The above method requires only one parameter:

a.)The codePoint which is the character that needs to be tested.

Return Value

The isWhitespace(int codePoint) method returns a Boolean value, i.e., true if the given(or specified) character is a Java whitespace character. Otherwise, this method returns false.

Example 1

public class JavaCharacterisWhitespaceExample_1 {
    public static void main(String[] args) {
        // Initialize three codepoints: cp1, cp2 and cp3
                int cp1 = 49;
                int cp2 = 121;
                int cp3 = 234;
       // Check whether the codepoints are whitespaces or not.
	        boolean check1 = Character.isWhitespace(cp1);
                boolean check2 = Character.isWhitespace(cp2);
                boolean check3 = Character.isWhitespace(cp3);
       // Print the result.
		if(check1){
		System.out.print("The codepoint \'"+cp1+"\' is a whitespace character.\n");
		}
		else{
		System.out.print("The codePoint \'"+cp1+"\' is not a whitespace character.\n");
		}
                
		if(check2){
		System.out.print("The codepoint \'"+cp2+"\' is a whitespace character.\n");
		}
		else{
		System.out.print("The codePoint \'"+cp2+"\' is not a whitespace character.\n");
		}
                
                              if(check3){
		System.out.print("The codepoint \'"+cp3+"\' is a whitespace character.\n");
		}
		else{
		System.out.print("The codePoint \'"+cp3+"\' is not a whitespace character.\n");
	}
    }
}

Output:

The codePoint '49' is not a whitespace character.
The codePoint '121' is not a whitespace character.
The codePoint '234' is not a whitespace character.

Example 2

public class JavaCharacterisWhitespaceExample_2 {
    public static void main(String[] args) {
        // Initialize three codepoints: cp1, cp2 and cp3
                int cp1 = 9;
                int cp2 = 10;
                int cp3 = 13;
       // Check whether the codepoints are whitespaces or not.
                boolean check1 = Character.isWhitespace(cp1);
                boolean check2 = Character.isWhitespace(cp2);
                boolean check3 = Character.isWhitespace(cp3);
        // Print the result.
            if(check1){
  System.out.print("The codepoint \'"+cp1+"\' is a whitespace character.\n");
                       }
            else{
System.out.print("The codePoint \'"+cp1+"\' is not a whitespace character.\n");
                       }
                
            if(check2){
System.out.print("The codepoint \'"+cp2+"\' is a whitespace character.\n");
                       }
             else{
System.out.print("The codePoint \'"+cp2+"\' is not a whitespace character.\n");
                  }
                
            if(check3){
System.out.print("The codepoint \'"+cp3+"\' is a whitespace character.\n");
                   }
             else{
System.out.print("The codePoint \'"+cp3+"\' is not a whitespace character.\n");
         }
    }
}

Output:

The codepoint '9' is a whitespace character.
The codepoint '10' is a whitespace character.
The codepoint '13' is a whitespace character.

Example 3

public class JavaCharacterisWhitespaceExample_3 {
    public static void main(String[] args) {
        // Initialize three codepoints: cp1, cp2 and cp3
                int cp1 = 9;
                int cp2 = 121;
                int cp3 = 245;
      // check whether the codepoints are whitespaces or not.
               boolean check1 = Character.isWhitespace(cp1);
                boolean check2 = Character.isWhitespace(cp2);
                boolean check3 = Character.isWhitespace(cp3);
        // Print the result.
System.out.println("The first codePoint '"+cp1+"' is a Java space character:"+check1);	
System.out.println("The first codePoint '"+cp2+"' is a Java space character:"+check2);	
System.out.println("The first codePoint '"+cp3+"' is a Java space character:"+check3);	
    }
} 

Output:

The first codePoint '9' is a Java space character:true
The first codePoint '121' is a Java space character:false
The first codePoint '245' is a Java space character:false

Next TopicJava-character-lowsurrogate-method

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