shz.core.stack.a.JArrayStack Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of core

${project.artifactId}

There is a newer version: 2024.0.2

package shz.core.stack.a;

import shz.core.ArrayHelp;

import java.util.Arrays;
import java.util.Objects;
import java.util.function.LongConsumer;

/**
 * 元素类型为long基于动态数组的栈
 * 
 * 24+8*n(n为元素个数)=es
 * 
 * B=48+8*n
 */
public class JArrayStack extends ArrayStack {
    private static final long serialVersionUID = -4128459839564949570L;
    protected long[] es;

    public JArrayStack(int capacity) {
        super(capacity);
        es = new long[capacity];
    }

    public JArrayStack() {
        this(DEFAULT_CAPACITY);
    }

    public static JArrayStack of(int capacity) {
        return new JArrayStack(capacity);
    }

    public static JArrayStack of() {
        return new JArrayStack();
    }

    @Override
    protected final void resize(int capacity) {
        this.capacity = capacity;
        es = Arrays.copyOf(es, capacity);
    }

    @Override
    protected final void setNull(int i) {
        es[i] = 0L;
    }

    public final void push(long e) {
        beforePush();
        es[size++] = e;
    }

    public final long pop() {
        checkEmpty();
        long e = es[--size];
        afterPop();
        return e;
    }

    public final long peek() {
        checkEmpty();
        return es[size - 1];
    }

    public final void reverse() {
        if (size > 1) ArrayHelp.reverse(es, 0, size);
    }

    public final void forEach(LongConsumer action) {
        Objects.requireNonNull(action);
        int current = size;
        while (current > 0) action.accept(es[--current]);
    }
}