Question

Need help solving this question. Dont even know where to start. Thanks.

... 5. Complete the following program to implement the user interface of the preceding exercise. For simplicity, only the units cm, m, and in are supported UnitConverter.java 1 import java.util.Scanner; 3 public class UnitConverter 4 public static void main (String [] args) Scanner in= new Scanner(System.in); boolean done = false; double factorl = 1; 10 String unitl String unit2 = 11 12 13 14 while (!done) 15 boolean getSecond = true; System.out.print("From unit (in, cm, m, again, quit) ") String command = in.next( ); (command.equals ( "in") ) 16 17 20 factorl 2.54; / Convert to cm unitl command; 21 22 23 else if (command.equals ( "cm") ) 24 25 26 else if (command.equals("m" ) ) 29 31 else if (command . equals ( "again" ) ) 32 33 34 getSecond = false; 35 else if (command.equals("quit") ) 36 37 38 done true; getSecond false; 4А else 41 42 System.out.println ( "Sorry, unknown unit."); getSecond false; 43 44 45 46 if (getSecond) { System.out.print("To unit: unit2 in.next ; if (unit2.equals ( "in " ) ) 47 4о "); 50 51 52 53 factor2 2.54; // Convert from cm } else. . * 54 55 56 57 58 if . . .) 6А double value in.nextDouble ( ) ; double result = value * factorl factor2 System.out.println (value 61 62 63 unit2); unit1 result 64 65 } 66

Answer 1

import java.util.Scanner;
public class UnitConverter {
   public static void main(String[] args) {
       Scanner in = new Scanner(System.in);
       boolean done = false;
       double factor1 = 1;
       double factor2 = 1;
       String unit1 = "";
       String unit2 = "";
      
       while(!done) {
           boolean getSecond = true;
           System.out.print("From unit (in, cm, m, again, quit): ");
           String command = in.next();
           if (command.equals("in")) {
               factor1 = 2.54; //convert inch to cm
               unit1 = command;
           }
           else if (command.equals("m")) {
               factor1 = 100; //convert meter to cm
               unit1 = command;
           }
           else if (command.equals("cm")) {
               factor1 = 1; //convert cm to cm
               unit1 = command;
           }
           else if (command.equals("again")) {
               getSecond = false;
           }
           else if (command.equals("quit")) {
               getSecond = false;
               done = true;
           }
           else {
               System.out.println("Sorry, Unknown unit.");
               getSecond = false;
           }
          
           if (getSecond) {
               System.out.print("To unit: ");
               unit2 = in.next();
               if (unit2.equals("in")) {
                   factor2 = 2.54; // Convert to inch from cm
               }
               else if (unit2.equals("m")) {
                   factor2 = 100; // Convert to m from cm
               }
               else if (unit2.equals("cm")) {
                   factor2 = 1; // Convert cm from cm
               }
           }
           if (!done) {
               double value = in.nextDouble();
               // We first convert the input value into cm depending upon factor1
               // That is, if unit1 was inch, we convert to cm by multiplying with 2.54
               // if it was meter, we convert to cm by multiplying by 100 etc
              
               // Once we have cm, we convert it into unit2, depending upon factor2
               // That is, if unit2 was inch, we convert to cm by dividing with 2.54
               // if it was meter, we convert to cm by dividing by 100 etc
              
               double result = (value * factor1)/factor2;
              
               System.out.println(value + " " + unit1 + " = " + result + " " + unit2);
           }
       }
   }
}

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The spacing & indentation might not look proper, once I post this answer. Hence, attaching screenshot too for quick readability.

while(!done) { boolean getSecond System.out.print ( " From unit (in, String command if (command.equals ( " in" ) ) { factor1 = 2.54; //convert inch to cm unit1 = true; cm, m, again, quit): "); in.next(); command; else if (command.equals ("m" )) { factor1 100; //convert meter to cm unit1 command; else if (command. equals ("cm" ) ) { factor1 = 1; //convert cm to cm unit1 command; = else if (command .equals ("again" ) ) { getSecond = false; else if (command.equals("quit")) { getSecond = done false; = true; else f System.out.println ( "Sorry, Unknown unit."); getSecond = false; if (getSecond) {d/ System.out.print (" To unit: "); unit2 in.next(); - if (unit2.equals ( " in " ) ) { factor2 2.54; Convert to inch from cm = else if (unit2. equals ("m" ) ) { = 100; // Convert to m from cm factor2 else if (unit2 .equals (" cm")) { factor2 = 1; // Convert cm from cm if (!done) { double value = in.nextDouble ( ) ; /We first convert the input value into cm / That is, if unit1 was inch, we convert to cm by multiplying with 2.54 / if it was meter, we convert to cm depending upon factor1 by multiplying by 100 etc /Once we have cm, we convert it into unit2, depending upon factor2 //That is, if unit2 was // if it was meter, we convert to cm inch, we convert to cm by dividing with 2.54 by dividing by 100 etc double result (value factor1)/factor2; System.out.println (value 1Е + unit1 + result + 11 11 unit2); +