Example usage for java.lang Character isLetterOrDigit

Introduction

In this page you can find the example usage for java.lang Character isLetterOrDigit.

Prototype

public static boolean isLetterOrDigit(int codePoint)

Source Link

Document

Determines if the specified character (Unicode code point) is a letter or digit.

Usage

From source file:com.clark.func.Functions.java

/**
 * <p>//from w  w w.ja v  a 2s  . c  o  m
 * Checks if the CharSequence contains only unicode letters or digits.
 * </p>
 * 
 * <p>
 * <code>null</code> will return <code>false</code>. An empty CharSequence
 * (length()=0) will return <code>true</code>.
 * </p>
 * 
 * <pre>
 * isAlphanumeric(null)   = false
 * isAlphanumeric("")     = true
 * isAlphanumeric("  ")   = false
 * isAlphanumeric("abc")  = true
 * isAlphanumeric("ab c") = false
 * isAlphanumeric("ab2c") = true
 * isAlphanumeric("ab-c") = false
 * </pre>
 * 
 * @param cs
 *            the CharSequence to check, may be null
 * @return <code>true</code> if only contains letters or digits, and is
 *         non-null
 * @since 3.0 Changed signature from isAlphanumeric(String) to
 *        isAlphanumeric(CharSequence)
 */
public static boolean isAlphanumeric(CharSequence cs) {
    if (cs == null) {
        return false;
    }
    int sz = cs.length();
    for (int i = 0; i < sz; i++) {
        if (Character.isLetterOrDigit(cs.charAt(i)) == false) {
            return false;
        }
    }
    return true;
}

From source file:bfile.util.StringUtils.java

/**
 * <p>Checks if the CharSequence contains only Unicode letters or digits.</p>
 *
 * <p>{@code null} will return {@code false}.
 * An empty CharSequence (length()=0) will return {@code false}.</p>
 *
 * <pre>/*www.  ja  v  a2 s  .  c  om*/
 * StringUtils.isAlphanumeric(null)   = false
 * StringUtils.isAlphanumeric("")     = false
 * StringUtils.isAlphanumeric("  ")   = false
 * StringUtils.isAlphanumeric("abc")  = true
 * StringUtils.isAlphanumeric("ab c") = false
 * StringUtils.isAlphanumeric("ab2c") = true
 * StringUtils.isAlphanumeric("ab-c") = false
 * </pre>
 *
 * @param cs  the CharSequence to check, may be null
 * @return {@code true} if only contains letters or digits,
 *  and is non-null
 * @since 3.0 Changed signature from isAlphanumeric(String) to isAlphanumeric(CharSequence)
 * @since 3.0 Changed "" to return false and not true
 */
public static boolean isAlphanumeric(final CharSequence cs) {
    if (isEmpty(cs)) {
        return false;
    }
    final int sz = cs.length();
    for (int i = 0; i < sz; i++) {
        if (Character.isLetterOrDigit(cs.charAt(i)) == false) {
            return false;
        }
    }
    return true;
}

From source file:bfile.util.StringUtils.java

/**
 * <p>Checks if the CharSequence contains only Unicode letters, digits
 * or space ({@code ' '}).</p>/*from ww w  .j a v a2s.com*/
 *
 * <p>{@code null} will return {@code false}.
 * An empty CharSequence (length()=0) will return {@code true}.</p>
 *
 * <pre>
 * StringUtils.isAlphanumericSpace(null)   = false
 * StringUtils.isAlphanumericSpace("")     = true
 * StringUtils.isAlphanumericSpace("  ")   = true
 * StringUtils.isAlphanumericSpace("abc")  = true
 * StringUtils.isAlphanumericSpace("ab c") = true
 * StringUtils.isAlphanumericSpace("ab2c") = true
 * StringUtils.isAlphanumericSpace("ab-c") = false
 * </pre>
 *
 * @param cs  the CharSequence to check, may be null
 * @return {@code true} if only contains letters, digits or space,
 *  and is non-null
 * @since 3.0 Changed signature from isAlphanumericSpace(String) to isAlphanumericSpace(CharSequence)
 */
public static boolean isAlphanumericSpace(final CharSequence cs) {
    if (cs == null) {
        return false;
    }
    final int sz = cs.length();
    for (int i = 0; i < sz; i++) {
        if (Character.isLetterOrDigit(cs.charAt(i)) == false && cs.charAt(i) != ' ') {
            return false;
        }
    }
    return true;
}