Title

public class Book{
    private String title;
    private double id;
    private static int count;
    protected double time;

    //contructor
    public Book(String title1){
        time = System.nanoTime();
        title = title1;
        id = Math.random()*100;
        count=1;
       // count = (int) (1+ Math.random()*3);

    }

    public int getCount(){
        return count++;
    }
    public void setCount(int count2){
        count = count2;
    }

    public double getId(){
        return id;
    }
    public String getTitle(){
        return title;
    }
 

    //tostring method
    public String toString(){
        String toString;
        toString = "{ID: " + this.getId() + " Title: " + this.getTitle() + " Count: " + this.getCount();
        return toString;
    }

    
    public double shelfLife(){
        return time;

    }

    public static void main(String[] args){
        Book book1 = new Book("Harry Potter");
        book1.getId();
        //book1.getCount();
        book1.toString();
        System.out.println(book1.toString());

        Book book2 = new Book("Umbrella Academy");
        book2.getId();
       // book2.getCount();
        System.out.println(book2.toString());
        System.out.println(book1.shelfLife());

    }







}

Book.main(null);

{ID: 86.36656790927653 Title: Harry Potter Count: 2
{ID: 2.9807733020455363 Title: Umbrella Academy Count: 1
2.582929328193E12

public class Textbook extends Book{
    private String company;
    protected double shelfLife;
    private int checkOuts;
    public static ArrayList<Textbook> texts = new ArrayList<Textbook>();

    public Textbook(String title2, String company2){
        super(title2);
        company = company2;
        checkOuts = (int)(Math.random()*10);
        company = "school";
        texts.add(this);
    
    } 



    public String getCompany(){
        return company;
    }
    public void setCompany(String company2){
        company = company2;
    }

    public String toString(){
        String addition = " company: " + this.getCompany() +  " shelfLife: " + this.shelfLife() +" }";
        String fin = (super.toString() + addition);
        return fin;
        
    }


    public static void main(String[] args){
        Textbook text1 = new Textbook("CSA", "mort");
        text1.setCount(text1.getCount());
        System.out.println(text1.toString());
        


        Textbook text2 = new Textbook("Math", "lanzi");
        text2.setCount(text2.getCount()+1);
        System.out.println(text2.toString());


        texts.add(text1);
        texts.add(text2);
    

        for (int i=0; i< texts.size(); i++){
            System.out.println(texts.get(i).toString());
    
        }

    }
}

Textbook.main(null);

{ID: 67.17853173240944 Title: CSA Count: 1 company: school shelfLife: 3.452327677501E12 }
{ID: 66.46165242159779 Title: Math Count: 2 company: school shelfLife: 3.452329495786E12 }
{ID: 67.17853173240944 Title: CSA Count: 3 company: school shelfLife: 3.452327677501E12 }
{ID: 66.46165242159779 Title: Math Count: 4 company: school shelfLife: 3.452329495786E12 }
{ID: 67.17853173240944 Title: CSA Count: 5 company: school shelfLife: 3.452327677501E12 }
{ID: 66.46165242159779 Title: Math Count: 6 company: school shelfLife: 3.452329495786E12 }

public class Novel extends Book{
    private String author;
    private int checkOuts;
    private double shelfLife;
    private int pages;
    public static ArrayList<Novel> novels = new ArrayList<Novel>();
    

    public Novel(String title2, String author2){
        super(title2);
        author = author2;
        checkOuts = (int)(Math.random()*10);
        pages = 100;
        novels.add(this);
    
    }
    public String toString(){
        String addition = " pages: " + this.getPages() + " author: " + getAuthor() + " shelfLife: " + this.shelfLife() +" }";
        String fin = (super.toString() + addition);
        return fin;
    }

    public String getAuthor(){
        return author;
    }
    public void setAuthor(String author2){
        author = author2;
    }

    public void setPages(int pages2){
        pages = pages2;
    }
    public int getPages(){
        return pages;
    }

    public void expire(){
        if(this.shelfLife>3.6){
            novels.remove(this);
        }
    }


    public static void main(String[] args){
        Novel novel1 = new Novel("A", "Aadya");
        novel1.setCount(novel1.getCount());
        System.out.println(novel1.toString());
        


        Novel novel2 = new Novel("B", "Avanthika");
        novel2.setCount(novel2.getCount()+1);
        System.out.println(novel2.toString());


        Novel novel3 = new Novel("C", "Shreya");
        novel3.setCount(novel3.getCount()+2);
        System.out.println(novel3.toString());

 

        for (int i=0; i< novels.size(); i++){
            //novels.get(i).setCount(novel3.getCount()+1);
            System.out.println(novels.get(i).toString());
    
        }

    }
}

Novel.main(null);

{ID: 95.53224074559856 Title: A Count: 1 pages: 100 author: Aadya shelfLife: 3.674636707847E12 }
{ID: 42.23448819939387 Title: B Count: 2 pages: 100 author: Avanthika shelfLife: 3.674638247555E12 }
{ID: 37.18685999354121 Title: C Count: 3 pages: 100 author: Shreya shelfLife: 3.674638542502E12 }
{ID: 95.53224074559856 Title: A Count: 4 pages: 100 author: Aadya shelfLife: 3.674636707847E12 }
{ID: 42.23448819939387 Title: B Count: 5 pages: 100 author: Avanthika shelfLife: 3.674638247555E12 }
{ID: 37.18685999354121 Title: C Count: 6 pages: 100 author: Shreya shelfLife: 3.674638542502E12 }

// Mode:

int[] array = {1,5,6,5,2,2,5,3,4,4,6,7,7,7,7,7};
// bubble sort
ArrayList<Integer> mode = new ArrayList<Integer>();
ArrayList<Integer> values = new ArrayList<Integer>();
for (int j = 0; j<array.length; j++){
    for (int i = 0; i<array.length-1; i++){
        if(array[i]>array[i+1]){
            int temp = array[i];
            array[i] = array[i+1];
            array[i+1] = temp;
        }
    }
}



int count = 1;
for (int i = 0; i<array.length-1; i++){
    if(array[i] == array[i+1]){
        count++;
       // System.out.println(count);
        continue;
    }
    modes.add(count);
    values.add(array[i]);
    count = 1;
} 
int max = 0;
int index;
for (index =0; index<mode.size(); index++){
    if (mode.get(index)>max){
        max = mode.get(index);
    }
}

System.out.println(values.get(index));



for (int i = 0; i<array.length; i++){
   System.out.print(array[i]);
}
System.out.println();
for (int i = 0; i<mode.size(); i++){
    System.out.print(mode.get(i));
 }
System.out.println();
 for (int i = 0; i<values.size(); i++){
    System.out.print(values.get(i));
 }

1
1223445556677777

123456

int[] array = {1,5,6,5,2,2,5,3,4,4,6,7,7,7,7,7};

int maxNumber = -1;
int mode = -1;

for (int i = 0; i<array.length; i++){
    int count=0; 
    for (int j=0; j<array.length;j++){
        if(array[i]==array[j]){
            count++;
        }
    }
    if(count>mode){
        mode = count;
        maxNumber = array[i];
    }

}

System.out.println(maxNumber);

7