Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.io.UnsupportedEncodingException;

public class Main {
    public static String truncate(String str, int byteLength) {
        if (str == null) {
            return null;
        }
        if (str.length() == 0) {
            return str;
        }
        if (byteLength < 0) {
            throw new IllegalArgumentException("Parameter byteLength must be great than 0");
        }
        int i = 0;
        int len = 0;
        int leng = 0;
        char[] chs = str.toCharArray();
        try {
            leng = str.getBytes("gbk").length;

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        if (leng <= byteLength)
            return str;
        while ((len < byteLength) && (i < leng)) {
            len = (chs[i++] > 0xff) ? (len + 2) : (len + 1);
        }

        if (len > byteLength) {
            i--;
        }
        return new String(chs, 0, i) + "...";
    }
}