Java Create Value class that represents the values that can be stored in the nod

ID: 3801163 • Letter: J

Question

Java

Create Value class that represents the values that can be stored in the node class.

A value can be either a double or a string. A separate data field is provided for each so it is possible for a "Value" to contain both a double and a string.

The tag (Which is an enum of STRING, DBL, INVALID) field indicates which of these data fields holds the "real value" of the Value. A Value can also have an "INVALID" tag. Values are constructed with tag STRING, dval 0, and sval a null String.

Write a toString method for Value. Notice that you do not know whether the input will be a double or a string until after it has been entered. To resolve this problem accept the input as a String and check the first character. If it is a double quote mark (") it is a string and copy it (after allocating memory) without the quote mark to the sval field. Otherwise the input is intended as a double. In this case convert it to a double with Double.parseDouble and store the result in the dval field.

Explanation / Answer

JAVA Program :

import java.util.*;
import java.lang.*;
import java.io.*;

class Value{
    double dVal = 0;
    String sVal = "";
    String tag;

    @Override
    public String toString(){
        if(tag.equals("DOUBLE"))return dVal+"";
        return sVal;
    }
}
class Main
{
   public static void main (String[] args) throws java.lang.Exception
   {
       // your code goes here
       Scanner obj = new Scanner(System.in);
       String input = obj.next();
       Value v = new Value();
       if(input.charAt(0)=='"'){
            v.sVal = input.substring(1,input.length());
            v.tag = "STRING";
       }
       else{
            v.tag = "DOUBLE";
            v.dVal = Double.parseDouble(input);
       }
       System.out.println(v);
   }
}

OUTPUT :

"Hi

2.58

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Java Create Value class that represents the values that can be stored in the nod

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