Java Stack Peek peek(Stack stack, Class type)

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  5. peek(Stack stack, Class type)

    Description

    peek

    License

    LGPL

    Declaration 

    public static <V> Object peek(Stack<Object> stack, Class<?> type)

    Method Source Code

    //package com.java2s;
//License from project: LGPL 

import java.util.Stack;

public class Main {
    public static <V> Object peek(Stack<Object> stack, Class<?> type) {
        Object result = null;/*  w ww  .ja va 2s. com*/

        Object value = null;
        while (!((value = stack.peek()).getClass().isAssignableFrom(type))) {
            stack.pop();
        }
        if (value != null && value.getClass().isAssignableFrom(type))
            result = value;
        return result;
    }

    public static <V> Object pop(Stack<Object> stack, Class<?> type) {
        Object result = null;

        Object value = null;
        while (!((value = stack.pop()).getClass().isAssignableFrom(type))) {
            ;
        }
        if (value != null && value.getClass().isAssignableFrom(type))
            result = value;
        return result;
    }
}

    Related

    1. peekOrNull(final Stack stack)

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