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Java 为int值创建堆栈

欢马劈雪

工程师 (已认证)

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为int值创建堆栈

实例源码：

源代码：

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public class StackOfInts {

/*来自 
 n  o  w  j  a  v  a . c o m*/

private int[] stack;

private int next = 0; // index of last item in stack + 1

public StackOfInts(int size) {

//create an array large enough to hold the stack

stack = new int[size];

}

public void push(int on) {

if (next < stack.length)

stack[next++] = on;

}

public boolean isEmpty() {

return (next == 0);

}

public int pop() {

if (!isEmpty())

return stack[--next]; // top item on stack/* from 时 代 J     a    v  a - nowjava.com*/

else

return 0;

}

public int getStackSize() {

return next;

}

private class StepThrough {

// start stepping through at i=0

private int i = 0;

// increment index

public void increment() {

if (i < stack.length)

i++;

}

// retrieve current element

public int current() {

return stack[i];

}

// last element on stack?

public boolean isLast() {

if (i == getStackSize() - 1)

return true;

else

return false;

}

public StepThrough stepThrough() {

return new StepThrough();

}

public static void main(String[] args) {

// instantiate outer class as "stackOne"

StackOfInts stackOne = new StackOfInts(15);

// populate stackOne

for (int j = 0; j < 15; j++) {

stackOne.push(2 * j);

}

// instantiate inner class as "iterator"

StepThrough iterator = stackOne.stepThrough();

// print out stackOne[i], one per line

while (!iterator.isLast()) {

System.out.print(iterator.current() + " ");

iterator.increment();

}

System.out.println();

}

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* are met:

*   - Redistributions of source code must retain the above copyright

*     notice, this list of conditions and the following disclaimer.

*   - Redistributions in binary form must reproduce the above copyright

*     notice, this list of conditions and the following disclaimer in the

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*   - Neither the name of Oracle or the names of its

*     contributors may be used to endorse or promote products derived

*     from this software without specific prior written permission.

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

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编辑于 2020-03-26 09:23:272020-03-26 09:23:27

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