Question

Program specification You and your partner must write a Java program to print a simple black and white excerpt of the periodic table of elements. First you should obtain the following information from the user: whether the 'Lanthanum, group (elements 57-71) and Άctinium, group (elements 89-103) should be printed-the default is no; the atomic number of the first element to display 118 is given; and the default is 1 and should be used whenever a value less than 1 or greater than the atomic number of the last element to displaythe default is 118 and should be used whenever a number smaller than the first number or larger than 118 is given. Once these values have been entered the program should display a table with the elements within the specified range displayed in their appropriate group (column). Any element in that range from the 'Lanthanum' and Actinium' groups should only be displayed if the user has requested this; there is no need to indent these, they should simply be displayed after the table. Your solution should run in Dr Java and comprise the following files .PeriodicTableInterface.java and PeriodicTable.java The specification and implementation (respectively) of the periodic table. You need to complete the methods declared in the interface; the interface itself is complete. And . AssigOne119.java-the driver class which contains the main) method.

Answer 1

 *  Compilation:  javac Element.java
 *  Execution:    java Element < elements.csv
 *  Dependencies: StdIn.java StdOut.java
 *                http://www.cs.princeton.edu/introcs/data/elements.csv
 *  
 *  Data type for elements in periodic table. Store name, atomic number,
 *  symbol, and atomic.
 *
 ******************************************************************************/

public class Element {
    private String name;       // name of element
    private int    number;     // number in periodic table
    private String symbol;     // atomic symbol
    private double weight;     // atomic weight 

    public Element(String name, int number, String symbol, double weight) {
        this.name   = name;
        this.number = number;
        this.symbol = symbol;
        this.weight = weight;
    }


    public String toString() {
        String s = "";
        s = s +  name   + " (" + symbol + ")\n";
        s = s + "Atomic number: " + number + "\n";
        s = s + "Atomic weight: " + weight + "\n";
        return s;
    }
    
    public static void main(String[] args) {
        int ELEMENTS = 103;
        Element[] elements = new Element[ELEMENTS];

        // ignore first line
        String s = StdIn.readLine();

        // read data
        for (int i = 0; i < ELEMENTS; i++) {
            s = StdIn.readLine();
            String[] fields = s.split(",");
            String name   = fields[0];
            int number    = Integer.parseInt(fields[1]);
            String symbol = fields[2];
            double weight = Double.parseDouble(fields[3]);
            elements[i] = new Element(name, number, symbol, weight);
            StdOut.println(elements[i]);
        }
    }
}