Java String Truncate truncate(final String s, final int n)

Description

Retrieves the first n characters of s, or all of s if its length is less than n

License

Open Source License

Parameter

Parameter	Description
s	the String to truncate
n	the desired number of characters

Return

the truncated String

Declaration

public static final String truncate(final String s, final int n) 

Method Source Code

//package com.java2s;
/**//from  ww  w.j  a  v a 2 s .  co  m
 * The contents of this file are subject to the Regenstrief Public License
 * Version 1.0 (the "License"); you may not use this file except in compliance with the License.
 * Please contact Regenstrief Institute if you would like to obtain a copy of the license.
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) Regenstrief Institute.  All Rights Reserved.
 */

public class Main {
    /**
     * Retrieves the first n characters of s, or all of s if its length is less than n
     * 
     * @param s the String to truncate
     * @param n the desired number of characters
     * @return the truncated String
     **/
    public static final String truncate(final String s, final int n) {
        return length(s) <= n ? s : s.substring(0, n);
    }

    /**
     * Returns the length of the given array
     * 
     * @param array the array for which to return the length
     * @return the length
     **/
    public final static int length(final Object array) {
        if (array == null) {
            return 0;
        } else if (array instanceof byte[]) {
            return ((byte[]) array).length;
        } else if (array instanceof short[]) {
            return ((short[]) array).length;
        } else if (array instanceof int[]) {
            return ((int[]) array).length;
        } else if (array instanceof long[]) {
            return ((long[]) array).length;
        } else if (array instanceof float[]) {
            return ((float[]) array).length;
        } else if (array instanceof double[]) {
            return ((double[]) array).length;
        } else if (array instanceof boolean[]) {
            return ((boolean[]) array).length;
        } else if (array instanceof char[]) {
            return ((char[]) array).length;
        }
        return ((Object[]) array).length;
    }

    /**
     * Returns the length of the given array
     * 
     * @param array the array for which to return the length
     * @return the length
     **/
    public final static int length(final Object[] array) {
        return array == null ? 0 : array.length;
    }

    /**
     * Returns the length of the given array
     * 
     * @param array the array for which to return the length
     * @return the length
     **/
    public final static int length(final byte[] array) {
        return array == null ? 0 : array.length;
    }

    /**
     * Returns the length of the given array
     * 
     * @param array the array for which to return the length
     * @return the length
     **/
    public final static int length(final int[] array) {
        return array == null ? 0 : array.length;
    }

    /**
     * Retrieves the length of the CharSequence
     * 
     * @param s the CharSequence
     * @return the length
     **/
    public final static int length(final CharSequence s) {
        return s == null ? 0 : s.length();
    }
}

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4. truncate(final String in, final int maxLen)
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6. truncate(final String str, final int len)
7. truncate(final String str, final int len)
8. truncate(final String str, final int maxWidth)
9. truncate(final String target, final int maxSize)