stack with min operation

How would you design a stack which, in addition to push and pop, also has a function
min which returns the minimum element? Push, pop and min should all operate in
O(1) time.

public class StackWithMin extends Stack<NodeWithMin> {
public void push(int value) {
int newMin = Math.min(value, min());
super.push(new NodeWithMin(value, newMin));
}
}
public int min() {
	
if (this.isEmpty()) {
		
return Integer.MAX_VALUE;
	
} else {
		
return peek().min;
	
}
}
class NodeWithMin {
public int value;
public int min;
public NodeWithMin(int v, int min){
value = v;
this.min = min;
}
}