programes on methods

Java Bubble Sort

3)

import java.util.*;
class  Factorial{
    public static int findFactorial(int n)
    {
        if (n == 1) {
            return n;
        }
        else {
            return n * findFactorial(n - 1);
        }
    }
    public static void main(String[] args) 
    {
        Scanner input=new Scanner(System.in);
        System.out.print("Enter number: ");
        int num=input.nextInt();
        System.out.println("The factorial of " +num+"  is : " + findFactorial(num));
    }
}

4)

import java.util.*;
class ConcatenateStrings 
{
    public static void main(String[] args) 
    {
        Scanner input=new Scanner(System.in);
        System.out.print("Enter string 1: ");
        String st1=input.nextLine();
        System.out.print("Enter string 2: ");
        String st2=input.nextLine();
        String str=st1.concat(st2);
        System.out.println("New String is: "+str);
    }
}

5)

import java.util.*;

class ShowData {
        String name;
        int age;
        int matches;
        int runs;
        double average;
        ShowData(String name,int age,int matches,int runs,double average){
        this.name=name;
        this.age=age;
        this.matches=matches;
        this.runs=runs;
        this.average=average;
        }
        public void setName(String name){
                this.name = name;
        }
        public String getName() {
                return name;
        }
        public void setAge(int age) {
                this.age = age;
        }
        public int getAge(){
                return age;
        }

        public void setMatches(int matches) {
                this.matches = matches;
        }
        public int getMatches(){
                return matches;
        }

        public void setRuns(int runs) {
                this.runs = runs;
        }
        public int getRuns(){
                return runs;
        }

        public void setAverage(double average) {
                this.average = average;
        }
        public double getAverage(){
                return average;
        }
       }
class AverageComparator implements Comparator{
public int compare(Object o1, Object o2) {
                                double d1 = ((ShowData) o1).getAverage();
                                double d2 = ((ShowData) o2).getAverage();
                                return Double.compare(d1, d2);
                        }
}



public class ArrayListEx{
         public static void main(String[] args){
             Scanner input=new Scanner(System.in);
               ArrayList<ShowData> list=new ArrayList<ShowData>();
               for(int i=0;i<5;i++){
                  System.out.print("Enter name: ");
                  String name=input.next();

                  System.out.print("Enter Age: ");
                  int age=input.nextInt();

                  System.out.print("Enter Matches: ");
                  int matches=input.nextInt();

                  System.out.print("Enter Runs: ");
                  int runs=input.nextInt();

                  System.out.print("Enter Batting Average: ");
                  double average=input.nextDouble();


               list.add(new ShowData(name,age,matches,runs,average));
               }
               System.out.println("Display record with respect to Batting Average: ");
               Collections.sort(list,new AverageComparator());
                for(ShowData data: list){
                System.out.println(data.getName()+"\t "+data.getAge()+"\t "+data.getMatches()+"\t "+data.getRuns()+"\t "+data.getAverage());
                }
            }
}

1. Boubble sort

public class BoubbleSort {

void boubbleSort(int[] array) { for(int i=0;iarray[j]) { int temp=array[i]; array[i]=array[j]; array[j]=temp; } } } }

void displayElements(int[] array) { for(int a:array) System.out.print(a +" "); System.out.println(); }

public static void main(String args[]) {

    int[] array={10,4,2,7,8,9};
    BoubbleSort bsort=new BoubbleSort();
    System.out.println("befor sorting ");
    bsort.displayElements(array);
    bsort.boubbleSort(array);
    System.out.println("after sorting");
    bsort.displayElements(array);

} }