com.google.gwt.dev.util.collect.IntStack Maven / Gradle / Ivy
/*
* Copyright 2014 Google Inc.
*
* 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.google.gwt.dev.util.collect;
import cern.colt.list.IntArrayList;
import java.io.Serializable;
/**
* An int stack.
*
* Because only int primitives are used performance and memory usage can surpass Object stacks.
*/
public class IntStack implements Serializable {
private IntArrayList values = new IntArrayList();
public boolean isEmpty() {
return values.isEmpty();
}
public int pop() {
int lastIndex = values.size() - 1;
int value = values.get(lastIndex);
values.remove(lastIndex);
return value;
}
public void push(int value) {
values.add(value);
}
}