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Stack.java

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/*

* Java Stack implementation with MAX memory size

*/

class Stack {

static final int MAX = 1000;

int top;

int a[] = new int[MAX];

boolean isEmpty() {

return (top < 0);

}

Stack() {

top = -1;

}

boolean push(int x) {

System.out.println(x + " pushed into stack");

if (top >= (MAX-1)) {

System.out.println("Stack Overflow");

return false;

}

a[++top] = x;

return true;

}

int pop() {

if (top < 0) {

System.out.println("Stack Underflow");

return 0;

}

int x = a[top--];

return x;

}

}