Question

How to use stack in Java

Answer 1

import java.util.Stack;

public class MyClass {
    public static void main(String args[]) {
        Stack<String> st = new Stack<>();
        
        st.push("java");
        st.push("c++");
        st.push("c#");

        System.out.println(st);
    }
}



/*
run:

[java, c++, c#]

*/

 

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Answer 2

import java.util.Stack;

public class MyClass {
    public static void main(String args[]) {
        Stack<String> st = new Stack<>();
        
        st.push("java");
        st.push("c++");
        st.push("c#");
        st.push("python");

        System.out.println(st);
        
        st.pop();
        
        System.out.println(st);
    }
}




/*
run:

[java, c++, c#, python]
[java, c++, c#]

*/

 

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Answer 3

import java.util.Stack;

public class MyClass {
    public static void main(String args[]) {
        Stack<String> st = new Stack<>();
        
        st.push("java");
        st.push("c++");
        st.push("c#");
        st.push("python");

        st.forEach(System.out::println);
    }
}




/*
run:

java
c++
c#
python

*/

 

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Answer 4

import java.util.Stack;

public class MyClass {
    public static void main(String args[]) {
        Stack<String> st = new Stack<>();
        
        st.push("java");
        st.push("c++");
        st.push("c#");
        st.push("python");

        System.out.println(st.peek());
    }
}




/*
run:

python

*/

 

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