Java Float parseFloat() Method

The parseFloat() method of Java Float class returns a new float value that is initialized to the value corresponding to defined String.

This method executes same as valueOf() method of Float class.

Syntax:

Parameters:

s- This is the string to be parsed.

Return Value:

The parseFloat() method returns the float value corresponding to the parameter passed.

Throws:

The parseFloat() method throws:

NullPointerException - If the string passed is null.
NumberFormatException - If the string passed does not hold a parsable float.

Example 1

public class FloatParseFloatExample1 {
    public static void main(String[] args) {
        String val1="100";
        String val2="76";
        //here instead of adding it will concatenate two Strings
        //but will convert the String into Float
        Float f = Float.parseFloat(val1+val2);
        System.out.println("1. Sum ="+f);
        Float f1 = Float.parseFloat(val1)+Float.parseFloat(val2);
        System.out.println("2. Sum ="+f1);
        Float f2 = Float.parseFloat(val1)*Float.parseFloat(val2);
        System.out.println("3. Multiplication ="+f2);
        Float f3 = Float.parseFloat(val1)/Float.parseFloat(val2);
        System.out.println("4. Division ="+f3);
        Float f4 = Float.parseFloat(val1)%Float.parseFloat(val2);
        System.out.println("5. Reminder ="+f4);
    }
}

Test it Now

Output:

1. Sum =10076.0
2. Sum =176.0
3. Multiplication =7600.0
4. Division =1.3157895
5. Reminder =24.0

Example 2

import java.util.Scanner;

public class FloatParseFloatExample2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter your Birth of year:");
        String str = scanner.next();
        //
        Float f1 = Float.parseFloat(str);
        Float f2 = 2018- f1;
        System.out.println("Your age = "+f2);
        if(f2>18){
            System.out.println("Congratulations! You can appear in this exam.");
        }
        else{
            Float f3=18-f2;
            System.err.println("Sorry! You are not eligible.Try again after "+f3+" years");
        }
    }
}

Test it Now

Output:

Enter your Birth of year:2003
Your age = 15.0
Sorry! You are not eligible.Try again after 3.0 years

Example 3

import java.util.Scanner;

public class FloatParseFloatMethodsExample3 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
           System.out.println("Enter 9 digit password ");
             String str= scanner.next();
             Float f1 = Float.parseFloat(str);
        System.out.println("Your password = "+f1);
    }
}

Test it Now

Output:

Enter 9 digit password 
reema@1234
Exception in thread "main" java.lang.NumberFormatException: For input string: "reema@1234"
	at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)
	at sun.misc.FloatingDecimal.parseFloat(FloatingDecimal.java:122)
	at java.lang.Float.parseFloat(Float.java:451)

Here, there is an exception because the string passed does not hold a parsable float. Its

Example 4

public class FloatParseFloatExample4 {
    public static void main(String[] args) {
        String str =null;
        Float f1 =Float.parseFloat(str);
        System.out.println("Float value = "+str);
    }
}

Test it Now

Output:

Exception in thread "main" java.lang.NullPointerException
	at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1838)
	at sun.misc.FloatingDecimal.parseFloat(FloatingDecimal.java:122)

Example 5

import java.util.Scanner;

public class FloatParseFloatExample5 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        try {
            System.out.println("Enter 9 digit password ");
            String str = scanner.next();
            Float f1 = Float.parseFloat(str);
            System.out.println("Your password = " + f1);
        }catch(NumberFormatException ex){
            System.out.println("An exception "+ex+"has occured.\n Plz enter a valid integer");
        }catch(NullPointerException ex) {
            System.out.println("An exception " + ex + "has occured.\n Plz enter a valid integer");
         }
        }
}

Test it Now

Output:

Enter 9 digit password 
reema panda
An exception java.lang.NumberFormatException: For input string: "reema"has occured.
 Plz enter a valid integer

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Java Float parseFloat() Method

Syntax:

Parameters:

Return Value:

Throws:

Example 1

Example 2

Example 3

Example 4

Example 5

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