Use Float.valueOf to convert string value to float : Float « Data Type « Java Tutorial






  1. Java Tutorial
  2. Data Type
  3. Float
/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

public class ValueOfDemo {
  public static void main(String[] args) {

    // this program requires two arguments on the command line
    if (args.length == 2) {
      // convert strings to numbers
      float a = (Float.valueOf(args[0])).floatValue();
      float b = (Float.valueOf(args[1])).floatValue();

      // do some arithmetic
      System.out.println("a + b = " + (a + b));
      System.out.println("a - b = " + (a - b));
      System.out.println("a * b = " + (a * b));
      System.out.println("a / b = " + (a / b));
      System.out.println("a % b = " + (a % b));
    } else {
      System.out.println("This program requires two command-line arguments.");
    }
  }
}








2.11.Float
2.11.1.Java float is 32 bit single precision type and used when fractional precision calculation is required.
2.11.2.Floating­Point Types
2.11.3.Min and Max values of data type float
2.11.4.Use Float constructor to convert float primitive type to a Float object.
2.11.5.Java Float Comparison
2.11.6.Java Float isInfinite Method
2.11.7.Java Float isNaN Method
2.11.8.Java Float Wrapper Class
2.11.9.Pass floats as string literals to a method
2.11.10.Check if a string is a valid number
2.11.11.Use toString method of Float class to convert Float into String.
2.11.12.Declaring a variable of type float
2.11.13.Declaring more than one float variable in a single statement
2.11.14.Use Float.valueOf to convert string value to float
2.11.15.Convert Java Float to Numeric Primitive Data Types
2.11.16.Convert Java String to Float Object
2.11.17.Convert from float to String
2.11.18.Convert from String to float
2.11.19.Converting a String to a float type Number
2.11.20.Compare Two Java float Arrays
2.11.21.Compares two floats for order.
2.11.22.For a float value x, this method returns +1.0F if x >= 0 and -1.0F if x < 0. Returns NaN if x is NaN.
2.11.23.Tests two float arrays for equality.
2.11.24.Use System.out.printf to format float point number