To maintain a stack and maintain the minimum stack of elements getmin__ stack

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Package com.offer.chapter1;

Import Java.util.Stack; /** * Copyrright (c) 2014-2016 haerbin hearglobal co.,ltd * Project:demo * Comments: * Author:cbam * Create date:2017 /2/4 * Modified by: * Modified Date: * Modified Reason: */public class Problem_01_mystack1 {private Stack<int
    Eger> Stackdata;

    Private stack<integer> stackmin;
        Public Problem_01_mystack1 () {this.stackdata = new stack<> ();
    This.stackmin = new stack<> (); public int Getmin () {if (This.stackMin.isEmpty ()) {throw new RuntimeException (' Your stack is E
        Mpty ");
    return This.stackMin.peek ();
        public void push (int newnum) {if (This.stackMin.isEmpty ()) {This.stackMin.push (newnum);
        else if (Newnum <= this.getmin ()) {This.stackMin.push (newnum);
    } this.stackData.push (Newnum);
        public int Pop () {if (This.stackData.isEmpty ()) {    throw new RuntimeException ("Your stack is empty");
        int value = This.stackData.pop ();
        if (value = = This.getmin ()) {This.stackMin.pop ();
    return value; }
}