Question

The goal in this exercise is to develop a program that will print out a list of student names together with other information foreach. The tab character

(an escape sequence) is helpful in getting the list to line up nicely. A program with only two names is in the file Names.java.

// ************************************************************

// Names.java

//

// Prints a list of student names with their hometowns

// and intended major

// ************************************************************

public class Names

{

// --------------------------

//

main prints the list

// --------------------------

public static void main (String[] args)

{

System.out.println ();

System.out.println (" \tName\t\tHometown") ;

System.out.println ("\t====\t\t========");

System.out.println ("\tSally\t\tRoanoke");

System.out.println ("\tAlexander\tWashington")

System.out.println ();

}

}

1. Save Names.java to your directory. Compile and run it to see how it works.

2. Modify the program so that your name and hometown and the name and hometown of at least two classmates sitting near

you in lab also are printed. Save, compile and run the program. Make sure the columns line up.

3. Modify the program to add a third column with the intended major of each person (assume Sally's major is Computer

Science and Alexander's major is Math). Be sure to add a label at the top of the third column and be sure everything is

lined up (use tab characters!).

Answer 1

//names.java file content

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

/* Name of the class has to be "Main" only if the class is public. */
class names{

public static void main(String []args){
System.out.println ();
System.out.println (" \tName\t\tHometown") ;
System.out.println ("\t====\t\t========");
System.out.println ("\tSally\t\tRoanoke");
System.out.println ("\tAlexander\tWashington");
//add two more student sitting near you
System.out.println ("\tJohn\t\tNewyork");
System.out.println ("\tSamanth\t\tBoston");
System.out.println ();
  
}
}

if executing in linux env , first compile

javac names.java

then execute using java names

//output of the program after adding two more names

        Name            Hometown                                                                                                                                                

        ====            ========                                                                                                                                                

        Sally           Roanoke                                                                                                                                                 

        Alexander       Washington                                                                                                                                              

        John            Newyork                                                                                                                                                 

        Samanth         Boston   

---------------------------------------------------------------------------

//program to add one more column major

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

/* Name of the class has to be "Main" only if the class is public. */
public class names{

public static void main(String []args){
System.out.println ();
System.out.println (" \tName\t\tHometown\tMajor") ;
System.out.println ("\t====\t\t========\t=====");
System.out.println ("\tSally\t\tRoanoke\t\tComputer science");
System.out.println ("\tAlexander\tWashington\tMath");
//add two more student sitting near you
System.out.println ("\tJohn\t\tNewyork\t\tElectronics");
System.out.println ("\tSamanth\t\tBoston\t\tSocial");
System.out.println ();
  
}
}

--------------------------------------------------------

output of second program

sh-4.3$ javac names.java                                                                                                                                                        

sh-4.3$ java -Xmx128M -Xms16M names

                                                                                                                                                                                

        Name            Hometown        Major                                                                                                                                   

        ====            ========        =====                                                                                                                                   

        Sally           Roanoke         Computer science                                                                                                                        

        Alexander       Washington      Math                                                                                                                                    

        John            Newyork         Electronics                                                                                                                             

        Samanth         Boston          Social