Java Float Number Create toFloat(String str)

Description

Convert a String to a float, returning 0.0f if the conversion fails.

If the string str is null, 0.0f is returned.

 NumberUtils.toFloat(null)   = 0.0f NumberUtils.toFloat("")     = 0.0f NumberUtils.toFloat("1.5")  = 1.5f

License

Open Source License

Parameter

Parameter	Description
str	the string to convert, may be <code>null</code>

Return

the float represented by the string, or 0.0f if conversion fails

Declaration

public static float toFloat(String str)

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    /**/*  w ww . ja va2  s. co  m*/
     * <p>Convert a <code>String</code> to a <code>float</code>, returning
     * <code>0.0f</code> if the conversion fails.</p>
     *
     * <p>If the string <code>str</code> is <code>null</code>,
     * <code>0.0f</code> is returned.</p>
     *
     * <pre>
     *   NumberUtils.toFloat(null)   = 0.0f
     *   NumberUtils.toFloat("")     = 0.0f
     *   NumberUtils.toFloat("1.5")  = 1.5f
     * </pre>
     *
     * @param str the string to convert, may be <code>null</code>
     * @return the float represented by the string, or <code>0.0f</code>
     *  if conversion fails
     * @since 2.1
     */
    public static float toFloat(String str) {
        return toFloat(str, 0.0f);
    }

    /**
     * <p>Convert a <code>String</code> to a <code>float</code>, returning a
     * default symbol if the conversion fails.</p>
     *
     * <p>If the string <code>str</code> is <code>null</code>, the default
     * symbol is returned.</p>
     *
     * <pre>
     *   NumberUtils.toFloat(null, 1.1f)   = 1.0f
     *   NumberUtils.toFloat("", 1.1f)     = 1.1f
     *   NumberUtils.toFloat("1.5", 0.0f)  = 1.5f
     * </pre>
     *
     * @param str the string to convert, may be <code>null</code>
     * @param defaultValue the default symbol
     * @return the float represented by the string, or defaultValue
     *  if conversion fails
     * @since 2.1
     */
    public static float toFloat(String str, float defaultValue) {
        if (str == null)
            return defaultValue;
        try {
            return Float.parseFloat(str);
        } catch (NumberFormatException nfe) {
            return defaultValue;
        }
    }
}