Add With JAVA STACK
오라클자바커뮤니티에서
설립한 오엔제이프로그래밍 실무교육센터
(오라클SQL,
튜닝, 힌트,자바프레임워크, 안드로이드,
아이폰, 닷넷 실무전문 강의)
[ArrayStack.java]
interface Stack {
public boolean isEmpty();
public int peek();
public void push(int theObject);
public int pop();
}
class EmptyStackException extends RuntimeException {
public EmptyStackException() {
super ("The stack is empty.");
}
public EmptyStackException (String message) {
super (message);
}
}
public class ArrayStack implements Stack {
int top; // current top of stack
int [] stack; // element array
/* create a stack with the given initial capacity */
public ArrayStack(int initialCapacity) {
if (initialCapacity < 1)
throw new IllegalArgumentException
("initialCapacity must be >= 1");
stack = new int [initialCapacity] ;
top = -1;
}
/** create a stack with initial capacity 10 **/
public ArrayStack() {
this(20);
}
/** return true if stack is empty */
public boolean isEmpty( ) {
return top == -1;
}
/** return top element of stack
* throw EmptyStackException when the stack is empty */
public int peek() {
if (isEmpty() )
throw new EmptyStackException();
return stack[top];
}
/** add theElement to the top of the stack */
public void push(int theElement) {
// increase array size if necessary
if (top == stack.length - 1) ensureCapacity();
// put theElement at the top of the stack
stack[++top] = theElement;
}
/** remove top element of stack and return it
* throw EmptyStackException when the stack is empty */
public int pop() {
if (isEmpty())
throw new EmptyStackException();
int topElement = stack[top];
return topElement;
}
private void ensureCapacity() {
int[] larger = new int[stack.length*2];
for (int index=0; index < stack.length; index++)
larger[index] = stack[index];
stack = larger;
}
public String toString() {
if (isEmpty())
return "<empty stack>";
String result = "<stack :";
for (int i = top; i >= 0; i--)
result += stack[i] + " ";
return result + ">";
} // end toString
}
[StackAdd.java]
class StackAdd extends ArrayStack{
private int v1, v2;
private ArrayStack stackA = new ArrayStack();
private ArrayStack stackB = new ArrayStack();
private ArrayStack stackC = new ArrayStack();
void fillStack(String s1, String s2) {
for(int i=0; i<s1.length(); i++) {
System.out.println(s1.charAt(i));
if (i < s1.length()) stackA.push(Integer.parseInt(s1.charAt(i)));
}
System.out.println("-------------------------");
for(int i=0; i<s2.length(); i++) {
System.out.println(s2.charAt(i));
if (i < s2.length()) stackB.push(Integer.parseInt(s2.charAt(i)));
}
System.out.println(stackA.peek());
System.out.println(stackB.peek());
}
void add() {
}
public static void main(String[] args) {
if (args.length < 2) {
System.out.println("Usage : java StackAdd number1 number2");
System.exit(1);
}
StackAdd s = new StackAdd();
s.fillStack(args[0], args[1]);
}
}
[출처]오라클자바커뮤니티, 오엔제이프로그래밍
www.onjprogramming.co.kr
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