complete the TODO's Java // TODO validity checking for all other constructor argumentsthis.name = null;this.lines = null;this.lat = -1;this.lon = -1;// TODO complete this constructor}/** Returns the station's name. */public String getName() {// TODO complete this methodreturn null;}/** Returns the station's geographical latitude. */public double getLat() {// TODO complete this methodreturn -1;}/** Returns the station's geographical longitude. */public double getLon() {// TODO complete this methodreturn -1;} package edu.luc.cs.cs271.lab7;limport.../** A CTA train station. */public class Station {public final static String city = "Chicago";public static double fare = 2.25;public final static double L0OP_LAT = 41.88204;public final static double L00P_LON = -87.62790;/** This station's latitude in degrees. */private final double lat/** This station's longitude in degrees. */private final double lon;/** This station's name. */private final String name;/** Set of train lines this station serves. */private final Set lines;/** Constructs a new station. */public Station(final String name, final Set line, final double lat, final double lon) {if (name == null) {throw new IllegalArgumentException("name is null");

// TODO validity checking for all other constructor arguments this.name = null; this.lines = null; this.lat = -1; this.lon = -1; // TODO complete this constructor } /** Returns the station's name. */ public String getName() { // TODO complete this method return null; } /** Returns the station's geographical latitude. */ public double getLat() { // TODO complete this method return -1; } /** Returns the station's geographical longitude. */ public double getLon() { // TODO complete this method return -1;

// TODO validity checking for all other constructor arguments this.name = null; this.lines = null; this.lat = -1; this.lon = -1; // TODO complete this constructor } /** Returns the station's name. */ public String getName() { // TODO complete this method return null; } /** Returns the station's geographical latitude. */ public double getLat() { // TODO complete this method return -1; } /** Returns the station's geographical longitude. */ public double getLon() { // TODO complete this method return -1;

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is:

Question

complete the TODO's

Java

// TODO validity checking for all other constructor arguments
this.name = null;
this.lines = null;
this.lat = -1;
this.lon = -1;
// TODO complete this constructor
}
/** Returns the station's name. */
public String getName() {
// TODO complete this method
return null;
}
/** Returns the station's geographical latitude. */
public double getLat() {
// TODO complete this method
return -1;
}
/** Returns the station's geographical longitude. */
public double getLon() {
// TODO complete this method
return -1;
}

package edu.luc.cs.cs271.lab7;
limport
...
/** A CTA train station. */
public class Station {
public final static String city = "Chicago";
public static double fare = 2.25;
public final static double L0OP_LAT = 41.88204;
public final static double L00P_LON = -87.62790;
/** This station's latitude in degrees. */
private final double lat
/** This station's longitude in degrees. */
private final double lon;
/** This station's name. */
private final String name;
/** Set of train lines this station serves. */
private final Set<Line> lines;
/** Constructs a new station. */
public Station(final String name, final Set<Line> line, final double lat, final double lon) {
if (name == null) {
throw new IllegalArgumentException("name is null");

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