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MoveZeroes.java
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MoveZeroes.java
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/*
* Copyright (c) [2017] [Haibo(Tristan) Yan]
*
* Licensed 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.
*/
package com.haibo.yan.algorithm.array;
/**
* Giving a array which has zero and no-zero elements, move all zero elements to the end and no-zero elements to the
* begin. Also please keep original order of no zero values
*/
public class MoveZeroes {
public static void move(int[] array) {
if (array == null || array.length == 0) {
return;
}
int p1 = 0, p2 = 0;
while (p2 < array.length) {
while (p2 < array.length && array[p2] == 0) {
p2++;
}
if (p2 < array.length) {
array[p1] = array[p2];
p1++;
p2++;
}
}
for (int i = p1; i < array.length; i++) {
array[i] = 0;
}
}
}