Question

Consider the class public elass Box·xtenda 0bJeetE private String stuff』 Write two constructors for the class. The first constructor will take zero input arguments and set the stuff attibute to null. The second will take a String as input and set the shul atbute to input string Getter and Setter Write a public getter method called getsauff that returns the string stored by the sthuff attribute If stulf is null, it should return the string "no stuff in here Write a public setter method called sersnuff thait takes a string as ingut If the stuff attribute is currently nul, the method sets it to the input string if strs not rudi, then it replaces its value with the concatenation of the input string with the character-r and then with the current strng istd For example, b.geestuff b.setstuffcata stuffa "cat b.setStuff4"dog.32 //stuff is.dogleat® toStringO The Box class inherits a publie atring totringtn method from the Object class Override this method so that the return string looks like a box that is empty (when stuff is nul) and contains the stuff string when it is not For example Systen.out. printl.n cb)」 b.setstufkitten yaten.out.printlno System,out ,print 2m (D)』 should display equals0 The Box class inherits the method public boolean eqeals (object other

Answer 1

public class Box extends Object { private String stuff; public Box(String stuff) { this.stuff = stuff; } public Box() { this.stuff = null; } public String getStuff() { return stuff; } public void setStuff(String stuff) { if (this.stuff == null) { this.stuff = stuff; return; } this.stuff += "|" + stuff; } @Override public String toString() { int len = stuff.length(); String result = ""; result += drawStars(len) + "\n" + ("* " + stuff + " *") + "\n" + drawStars(len); return result; } @Override public boolean equals(Object obj) { if (obj == null) { return false; } if (obj.getClass() != this.getClass()) { return false; } if (obj == this) { return true; } Box that = (Box) obj; return this.stuff == that.stuff; } private String drawStars(int len) { StringBuilder result = new StringBuilder(); for (int i = 0; i < len + 5; i++) { result.append("*"); } return result.toString(); } public static Box merge(Box[] boxes) { Box result = new Box(); for (Box box : boxes) { result.setStuff(box.getStuff()); } return result; } public static Box[] split(Box box) { String[] splitStff = box.getStuff().split("|"); Box[] boxes = new Box[splitStff.length/2 + 1]; int c=0; for (String stff: splitStff) { if (!stff.equalsIgnoreCase("|")) { boxes[c] = new Box(stff); c++; } } return boxes; } public static void main(String[] args) { Box box = new Box(""); System.out.println(box.getStuff()); System.out.println(box); box.setStuff("Kitchen"); System.out.println(box); Box anotherBox = new Box(); System.out.println(box.equals(anotherBox)); anotherBox.setStuff("Kitchen"); System.out.println(box.equals(anotherBox)); Box box1 = new Box("a"); box1.setStuff("x"); Box box2 = new Box("yax"); Box box3 = merge(new Box[]{box1, box2}); System.out.println(box3); Box box4 = new Box("a|b|c"); Box[] splitBoxes = split(box4); for (Box splitBox: splitBoxes) { System.out.println(splitBox); } } }

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