Write a Java program to compare two Stack collections
The code demonstrates how to compare stacks for equality in Java using the equals method. Let's go through the code step by step:
- The code begins by importing the necessary libraries: java.io.* and java.util.* .
- The Copmare_Stack class is defined, serving as the entry point of the program.
- In the main method, three stack objects are created using the raw Stack class: sta1, sta2, and sta3. It is important to note that using raw types is not recommended, and it's better to use generics to specify the type of elements in the stack.
- Strings "Pink," "Yellow," and "Blue" are pushed onto sta1 using the push method.
- Strings "Green" and "Red" are pushed onto sta2 using the push method.
- Strings "Pink," "Yellow," and "Blue" are pushed onto sta3 using the push method.
- The equals method is used to compare sta1 and sta3 for equality. If they are equal, the code prints "Stacks 1 and 3 are Equal." Otherwise, it prints "Stacks 1 and 3 are Not Equal."
- The equals method is used again to compare sta2 and sta3 for equality. If they are equal, the code prints "Stacks 2 and 3 are Equal." Otherwise, it prints "Stacks 2 and 3 are Not Equal."
Source Code
import java.io.*;
import java.util.*;
public class Compare_Stack
{
public static void main(String[] args)
{
Stack sta1 = new Stack();
Stack sta2 = new Stack();
Stack sta3 = new Stack();
sta1.push("Pink");
sta1.push("Yellow");
sta1.push("Blue");
sta2.push("Green");
sta2.push("Red");
sta3.push("Pink");
sta3.push("Yellow");
sta3.push("Blue");
if (sta1.equals(sta3))
{
System.out.println("Stacks 1 and 3 are Equal.");
}
else
{
System.out.println("Stacks 1 and 3 are Not Equal.");
}
if (sta2.equals(sta3))
{
System.out.println("Stacks 2 and 3 are Equal.");
}
else
{
System.out.println("Stacks 2 and 3 are Not Equal.");
}
}
}
Output
Stacks 1 and 3 are Equal.
Stacks 2 and 3 are Not Equal.