Question

Java

Do 68a, 68b, 68c, 68d. Show code & output.

public class Employee { private int id; private String name; private int sal; public Employee(int id, String name, int sal) { super(); this.id = id; this.name = name; this.sal = sal; } public int getid) { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; public void setName(String name) { this.name = name; } public int get Sall) { return sal; } public void setSal(int sal) { this.sal = sal; }

Answer 1

68a.

40 41 42 43 44 45 46 47 48 class Demo public static void main(String[] args) { //680 ArrayList<Employee> al = new ArrayList<Employee>(); al.add(new Employee (101,"sam", 1000)); al.add(new Employee (102,"sameer", 2000)); al.add(new Employee(103,"shyam", 3000)); al.add(new Employee (184,"ram", 4000)); al.add(new Employee (105,"ramesh", 5000)); al.add(new Employee (106,"sameera", 60000)); ArrayList<Integer ids - new ArrayList(al.stream().map(x->x.getId().collect(Collectors.toList()); ArrayList<String> names = new ArrayList(al.stream().map(x->x.getName().collect(Collectors.tolist()); ArrayList<Integer> sals = new ArrayList(al.stream().map(x->x.getSal().collect(Collectors.tolist()); System.out.println(ids); System.out.println(names); System.out.println(sals); } 49 59 51 52 53 54 55 56 57 }

Sample Output :

Run: Demo X → If 1 "C:\Program Files\Java\jdk-13\bin\java.exe" [101, 102, 103, 104, 105, 106] (sam, sameer, shyam, ram, ramesh, sameera] [1000, 2000, 3000, 4000, 5000, 60000] Process finished with exit code o

Program Code to Copy

import java.util.ArrayList;
import java.util.HashSet;
import java.util.stream.Collectors;

class Demo{
    public static void main(String[] args) {
        //68a
        ArrayList<Employee> al = new ArrayList<Employee>();
        al.add(new Employee(101,"sam",1000));
        al.add(new Employee(102,"sameer",2000));
        al.add(new Employee(103,"shyam",3000));
        al.add(new Employee(104,"ram",4000));
        al.add(new Employee(105,"ramesh",5000));
        al.add(new Employee(106,"sameera",60000));
        ArrayList<Integer> ids =  new ArrayList(al.stream().map(x->x.getId()).collect(Collectors.toList()));
        ArrayList<String> names =  new ArrayList(al.stream().map(x->x.getName()).collect(Collectors.toList()));
        ArrayList<Integer> sals =  new ArrayList(al.stream().map(x->x.getSal()).collect(Collectors.toList()));
        System.out.println(ids);
        System.out.println(names);
        System.out.println(sals);
    }
}

68b

Program Code Screenshot

40 41 42 43 44 45 46 class Demo{ public static void main(String[] args) { //680 ArrayList<Employee> al = new ArrayList<Employee>(); al.add(new Employee (101,"sam", 10000)); al.add(new Employee (102,"sameer", 2000)); al.add(new Employee (103,"shyam", 30000)); al.add(new Employee(104, "ram", 4000)); al.add(new Employee (105, "ramesh", 15000)); al.add(new Employee (106,"sameera", 60000)); ArrayList<Employee> highsal = new ArrayList(al.stream().filter(x->x.getSal()>5000).collect(Collectors.tolist()); System.out.println(highsal); } 47 48 49 50 51 52 53

Sample Output :

Run: 个 Demo "C:\Program Files\Java\jdk-13\bin\java.exe" [Employee@649d209a, Employee@6adca536, Employee@357246de, Employee@28f67ac7] ie Process finished with exit code o

Program Code to Copy

import java.util.ArrayList;
import java.util.HashSet;
import java.util.stream.Collectors;

class Demo{
    public static void main(String[] args) {
        //68a
        ArrayList<Employee> al = new ArrayList<Employee>();
        al.add(new Employee(101,"sam",10000));
        al.add(new Employee(102,"sameer",2000));
        al.add(new Employee(103,"shyam",30000));
        al.add(new Employee(104,"ram",4000));
        al.add(new Employee(105,"ramesh",15000));
        al.add(new Employee(106,"sameera",60000));
        ArrayList<Employee> highSal =  new ArrayList(al.stream().filter(x->x.getSal()>5000).collect(Collectors.toList()));
        System.out.println(highSal);
    }
}

68c.

Program Code Screenshot :

Main.java import java.util. HashSet; 1 2 3 4 5 on 7 class Demo{ public static void main(String[] args) { // Create hash set HashSet<Integer> ints = new HashSet<>(); 1/Add int! ints.add(4); ints.add(3); ints.add(4); ints.add(5); System.out.println("Integers "+ints); 8 9 10 11 12 13 14 }

Sample Output :

Run: Demo X "C:\Program Files\Java\jdk-13\bin\java.exe" Integers [3, 4, 5] IR Process finished with exit code o

Program Code to Copy

import java.util.HashSet;

class Demo{
    public static void main(String[] args) {
        //Create hash set
        HashSet<Integer> ints = new HashSet<>();
        //Add ints
        ints.add(4);
        ints.add(3);
        ints.add(4);
        ints.add(5);
        System.out.println("Integers "+ints);
    }
}

68d.

1 2 3 Main.java import java.util.HashSet; import java.util.objects; class Employee private int id; private String name; private int sal; 4. 5 6 7 8 @ 9 19 public Employee(int id, String name, int sal) { this.id = id; this.name = name; sal; } 11 this. sal = 12 13 14 public int getId() { return id; 15 16 } 17 18 public void setId(int id) { this.id = id; 19 20 } 21 22 public String getName() { return name; 23 24 ܝܟ 25 26 public void setName(String name) { this.name = name; 27 28 ܝܟ 29 30 public int getsal() { return sal; 31 32 } 33 34 public void setsal(int sal) { this. sal = sal; 35 36 ہا 37

38 39 @ 40 41 @Override public boolean equals(object o) { if (this o) return true; if (o == null || getClass() != 0.getClass()) return false; Employee employee - (Employee) o; return id employee.id && sal == employee.sal && Objects.equals(name, employee.name); 42 43 44 45 46 47 48 49 50 of //Hashcode and equals method @Override public int hashcode() { return Objects.hash(id, name, sal); } 51 52 53 54 55 56 57 @Override public String toString() { return "Employee{" + "id=" + id + + name + " + ", sal=" + sal + "}'; 58 name' 59 60 61 } 62 } 63 64 65 66 67 68 class Demo public static void main(String[] args) { //680 HashSet<Employee> al = new HashSet<>(); al.add(new Employee (101,"sam", 10000)); al.add(new Employee(101,"sam", 10000)); al.add(new Employee(103,"shyam", 30000)); al.add(new Employee (104,"ram", 4000)); al.add(new Employee(103,"shyam", 30000)); al.add(new Employee (106,"sameera", 60000)); 69 79 71 72 73 74 75 System.out.println(al); 76 } 77

Sample Output :

Run: Demo "C:\Program Files\Java\jdk-13\bin\java.exe" ... [Employee{id=101, name='sam', sal=10000}, Employee{id=103, name='shyam', sal=30000}, Employee{id=104, name='ram', sal=4000}, Employee{id=106, name='sameera', sal=60000}] Process finished with exit code o

Program Code to Copy

import java.util.HashSet;
import java.util.Objects;
class Employee{
    private int id;
    private String name;
    private int sal;

    public Employee(int id, String name, int sal) {
        this.id = id;
        this.name = name;
        this.sal = sal;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getSal() {
        return sal;
    }

    public void setSal(int sal) {
        this.sal = sal;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Employee employee = (Employee) o;
        return id == employee.id &&
                sal == employee.sal &&
                Objects.equals(name, employee.name);
    }

    //Hashcode and equals method
    @Override
    public int hashCode() {
        return Objects.hash(id, name, sal);
    }

    @Override
    public String toString() {
        return "Employee{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", sal=" + sal +
                '}';
    }
}

class Demo{
    public static void main(String[] args) {
        //68a
        HashSet<Employee> al = new HashSet<>();
        al.add(new Employee(101,"sam",10000));
        al.add(new Employee(101,"sam",10000));
        al.add(new Employee(103,"shyam",30000));
        al.add(new Employee(104,"ram",4000));
        al.add(new Employee(103,"shyam",30000));
        al.add(new Employee(106,"sameera",60000));

        System.out.println(al);
    }
}