stack_using_array.java

stack_using_array.java

@@ -0,0 +1,65 @@
+/* Java program to implement basic stack 
+operations */
+class Stack { 
+	static final int MAX = 1000; 
+	int top; 
+	int a[] = new int[MAX]; // Maximum size of Stack 
+
+	boolean isEmpty() 
+	{ 
+		return (top < 0); 
+	} 
+	Stack() 
+	{ 
+		top = -1; 
+	} 
+
+	boolean push(int x) 
+	{ 
+		if (top >= (MAX - 1)) { 
+			System.out.println("Stack Overflow"); 
+			return false; 
+		} 
+		else { 
+			a[++top] = x; 
+			System.out.println(x + " pushed into stack"); 
+			return true; 
+		} 
+	} 
+
+	int pop() 
+	{ 
+		if (top < 0) { 
+			System.out.println("Stack Underflow"); 
+			return 0; 
+		} 
+		else { 
+			int x = a[top--]; 
+			return x; 
+		} 
+	} 
+
+	int peek() 
+	{ 
+		if (top < 0) { 
+			System.out.println("Stack Underflow"); 
+			return 0; 
+		} 
+		else { 
+			int x = a[top]; 
+			return x; 
+		} 
+	} 
+} 
+
+
+class Main { 
+	public static void main(String args[]) 
+	{ 
+		Stack s = new Stack(); 
+		s.push(10); 
+		s.push(20); 
+		s.push(30); 
+		System.out.println(s.pop() + " Popped from stack"); 
+	} 
+}