truncate a string by length and add Ellipses - Java java.lang

Java examples for java.lang:String Truncate

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Description

truncate a string by length and add Ellipses

Demo Code

//package com.java2s;

public class Main {
    public static void main(String[] argv) {
        String src = "java2s.com";
        int maxChars = 4;
        boolean addEllipses = true;
        System.out.println(truncate(src, maxChars, addEllipses));
    }//from   www. j  a  v a2  s.c  om

    public static String truncate(String src, int maxChars,
            boolean addEllipses) {
        if (src != null) {
            if (src.length() > maxChars) {
                StringBuilder result = new StringBuilder(src.substring(0,
                        maxChars));
                if (addEllipses && maxChars < src.length()) {
                    result.append("...");
                }
                return result.toString();
            }
        }
        return src;
    }

    public static int length(String source) {
        int result = 0;
        if (isNotEmpty(source)) {
            result = source.length();
        }
        return result;
    }

    public static String substring(String source, int offset, int dataLength) {
        StringBuilder sb = new StringBuilder();
        if (!isEmpty(source) && source.length() >= offset + dataLength) {
            sb.append(source.substring(offset, offset + dataLength));
        }
        return sb.toString();
    }

    public static boolean isNotEmpty(String str) {
        return !isEmpty(str);
    }

    public static boolean isEmpty(String str) {
        return (str == null || str.length() == 0);
    }
}

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