Java String Split by Char split(String s, char ch)

Description

split

License

Apache License

Declaration

public static String[] split(String s, char ch)

Method Source Code

//package com.java2s;
/*//from w  w w  .  j  a v a  2  s  . c  om
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.util.Collection;

import java.util.Iterator;

import java.util.LinkedList;

import java.util.Map;

public class Main {
    public static final String[] EMPTY_STRING_ARRAY = {};

    public static String[] split(String s, char ch) {
        if (isEmpty(s)) {
            return EMPTY_STRING_ARRAY;
        }

        int lastPos = 0;
        int curPos = s.indexOf(ch);
        if (curPos < 0) {
            return new String[] { s };
        }

        Collection<String> values = new LinkedList<>();
        do {
            String v = s.substring(lastPos, curPos);
            values.add(v);

            // skip separator
            lastPos = curPos + 1;
            if (lastPos >= s.length()) {
                break;
            }

            curPos = s.indexOf(ch, lastPos);
            if (curPos < lastPos) {
                break; // no more separators
            }
        } while (curPos < s.length());

        // check if any leftovers
        if (lastPos < s.length()) {
            String v = s.substring(lastPos);
            values.add(v);
        }

        return values.toArray(new String[values.size()]);
    }

    public static boolean isEmpty(CharSequence cs) {
        return length(cs) <= 0;
    }

    public static boolean isEmpty(Collection<?> c) {
        return (c == null) || c.isEmpty();
    }

    public static boolean isEmpty(Map<?, ?> m) {
        return (m == null) || m.isEmpty();
    }

    public static <T> boolean isEmpty(Iterable<? extends T> iter) {
        if (iter == null) {
            return true;
        } else if (iter instanceof Collection<?>) {
            return isEmpty((Collection<?>) iter);
        } else {
            return isEmpty(iter.iterator());
        }
    }

    public static <T> boolean isEmpty(Iterator<? extends T> iter) {
        return iter == null || !iter.hasNext();
    }

    @SafeVarargs
    public static <T> boolean isEmpty(T... a) {
        return length(a) <= 0;
    }

    public static boolean isEmpty(char[] chars) {
        return length(chars) <= 0;
    }

    public static int length(CharSequence cs) {
        return cs == null ? 0 : cs.length();
    }

    @SafeVarargs
    public static <T> int length(T... a) {
        return a == null ? 0 : a.length;
    }

    public static int length(char[] chars) {
        return (chars == null) ? 0 : chars.length;
    }

    public static int size(Collection<?> c) {
        return c == null ? 0 : c.size();
    }

    public static int size(Map<?, ?> m) {
        return m == null ? 0 : m.size();
    }
}

Java String Split by Char split(String s, char ch)

Description

License

Declaration

Method Source Code

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