Splits the argument on white space. - Java java.lang

Java examples for java.lang:Assert

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Description

Splits the argument on white space.

Demo Code


//package com.java2s;
import java.util.LinkedList;
import java.util.List;

public class Main {
    public static void main(String[] argv) throws Exception {
        String value = "java2s.com";
        System.out.println(java.util.Arrays.toString(split(value)));
    }//from w  w w .  ja  va 2 s .  c o m

    /**
     * An empty string array instance.
     */
    private final static String[] EMPTY_STRING_ARRAY = {};

    /**
     * Splits the argument on white space.
     * 
     * @param value the attribute value
     * @return a string array with zero or more strings none of which 
     * is the empty string and none of which contains white space characters.
     */
    public static String[] split(String value) {
        if (value == null || "".equals(value)) {
            return EMPTY_STRING_ARRAY;
        }
        int len = value.length();
        List<String> list = new LinkedList<>();
        boolean collectingSpace = true;
        int start = 0;
        for (int i = 0; i < len; i++) {
            char c = value.charAt(i);
            if (c == ' ' || c == '\t' || c == '\n' || c == '\r') {
                if (!collectingSpace) {
                    list.add(value.substring(start, i));
                    collectingSpace = true;
                }
            } else {
                if (collectingSpace) {
                    start = i;
                    collectingSpace = false;
                }
            }
        }
        if (start < len) {
            int end = len;
            for (int i = 1; len > i; i++) {
                char c = value.charAt(len - i);
                if (c == ' ' || c == '\t' || c == '\n' || c == '\r') {
                    end--;
                    continue;
                }
                break;
            }
            list.add(value.substring(start, end));
        }
        return list.toArray(EMPTY_STRING_ARRAY);
    }
}

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