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• Float.parseLong(String): The Float.parseLong(String) method is used to convert a string value into float type value.
It takes a string value as parameter and returns after converting it into float. It converts a string value into float if
and only if the passed value does not contain a letter or symbol. Syntax (any one of the following can be used) is:
Float variable = Float.parseLong(String);
Float variable = Float.valueOf(String);
Let us take an example:
String s= "345.56";
float fn;
fn=Float.parseFloat(s); OR fn=Float.valueOf(s);
System.out.println("Result: " + fn);
Output:
Result: 345.56
• Double.parseDouble(String): The Double.parseDouble(String) method is used to convert a string value into double
type value. It takes a string value as parameter and returns after converting it into double. It converts a string value
into double if and only if the passed value does not contain a letter or symbol. Syntax (any one of the following can
be used) is:
Double variable = Double.parseDouble(String);
Double variable = Double.valueOf(String);
Let us take an example:
String s= "345566789.78";
double dn;
dn=Double.parseDouble(s); OR fn=Double.valueOf(s);
System.out.println("Result: " + fn);
Output:
Result: 345566789.78
13.5.3 Different Methods of Character Wrapper Class
The Character class wraps a value of the primitive type char in an object. When a single digit, letter or any symbol is
enclosed between single quotes is known as character data type. For example,'a' ,'3','/', etc.
Using the Scanner class, you can take the character type data as input in the following ways:
Scanner sc = new Scanner();
char ch1 = sc.next().charAt(0);
OR
Using the InputStreamReader and BufferedReader classes:
BufferedReader br = new BufferedReader(InputStreamReader);
char ch1=(char)(br.read());
Methods of Character Class
Some of the methods of the Character class to manipulate the character type data are:
• Character.isLetter(): This method is used to check whether the parameter passed is a character or not. It returns a
boolean value. Syntax of the isLetter() method is:
boolean variable=Character.isLetter(char);
For example:
boolean b=Character.isLetter('A');
Output: true // as'A' is a character
boolean b=Character.isLetter('1');
Output: false //as'1' is not a character
330330 Touchpad Computer Applications-X

