The parseFloat() method in Float Class is a built in method in Java that returns a new float initialized to the value represented by the specified String, as done by the valueOf method of class Float.
Syntax:
public static float parseFloat(String s)
Parameters: It accepts a single mandatory parameter s which specifies the string to be parsed.
Return type: It returns e float value represented by the string argument.
Exception: The function throws two exceptions which are described below:
- NullPointerException– when the string parsed is null
- NumberFormatException– when the string parsed does not contain a parsable float
Below is the implementation of the above method.
Program 1:
// Java Code to implement// parseFloat() method of Float class  class GFG {      // Driver method    public static void main(String[] args)    {        String str = "100";          // returns the float value        // represented by the string argument        float val = Float.parseFloat(str);          // prints the float value        System.out.println("Value = " + val);    }} |
Output:
Value = 100.0
Program 2: To show NumberFormatException
// Java Code to implement// parseFloat() method of Float class  class GFG {      // Driver method    public static void main(String[] args)    {          try {            String str = "";              // returns the float value            // represented by the string argument            float val = Float.parseFloat(str);              // prints the float value            System.out.println("Value = " + val);        }          catch (Exception e) {            System.out.println("Exception: " + e);        }    }} |
Output:
Exception: java.lang.NumberFormatException: empty String
Program 3: To show NullPointerException
// Java Code to implement// parseFloat() method of Float class  class GFG {      // Driver method    public static void main(String[] args)    {          try {              String str = null;              // returns the float value            // represented by the string argument            float val = Float.parseFloat(str);              // prints the float value            System.out.println("Value = " + val);        }          catch (Exception e) {            System.out.println("Exception: " + e);        }    }} |
Output:
Exception: java.lang.NullPointerException
Reference: https://docs.oracle.com/javase/7/docs/api/java/lang/Float.html#parseFloat(java.lang.String)
