DEV Community: Infanta Mano

Constructor

Infanta Mano — Fri, 11 Jul 2025 03:06:32 +0000

package dynamic;

public class Construct
{
String model;
int year;

public Construct(){
    this.model = "camry";
    this.year = 2020;
}
public Construct(String model){
    this.model = model;
    this.year = 2025;
}
public Construct(String model,int year){
    this.model = model;
    this.year = year;
}


public static void main (String[] args)
{
    Construct myCar1 = new Construct();
    System.out.println(myCar1.model);
    System.out.println(myCar1.year);

    Construct myCar2 = new Construct("Carnival");
    System.out.println(myCar2.model);
    System.out.println(myCar2.year);

    Construct myCar = new Construct("Fusion", 2020);
    System.out.println(myCar.model);
    System.out.println(myCar.year);

}

DYNAMIC BINDING

Infanta Mano — Thu, 10 Jul 2025 04:54:54 +0000

//parent class
package dynamic;
public abstract class Parent {
public static void main(String[] args) {

}

public void take_tablet(){
    System.out.println("Take tablet");
}
public abstract void study();

}

//child class
package dynamic;

public class Child extends Parent {
public static void main(String[] args) {

    Parent ch = new Child();
    ch.take_tablet();
    ch.study();
}
public void work() {
    System.out.println("Java code");
}
public void study() {
    System.out.println("engg");
}

}

Single Inheritence

Infanta Mano — Wed, 09 Jul 2025 23:45:32 +0000

//parent class
package Sangam;

public class Groceries {
public int groceries_money = 100;
String color = "red";
static String grocery_name ="sangam";

public static void main(String[] args) {
}       
    void madurai_rice(){
        System.out.println("madurai_rice");

    }
    }

//child class
package Sangam;

public class Vegetables extends Groceries{
public int vegetable_money = 50;

public static void main(String[] args) {

    //child object
    Vegetables vegetable = new Vegetables();
    System.out.println(vegetable.groceries_money);
    System.out.println(vegetable.color);
    System.out.println(vegetable.grocery_name);

    vegetable.madurai_rice();

}
}

PROGRAM DOUBT

Infanta Mano — Tue, 08 Jul 2025 18:35:10 +0000

//MAIN CLAUSE
package demo;

public class Main {
public static void main (String[] args) {
Sample remote = new TVRemote();
remote.turnon();
remote.turnoff();

}
}
//SUBCLASS****
package first;

abstract class Sample{
    abstract void turnOn();
    abstract void turnOff();
}

// Concrete class implementing the abstract methods
class TVRemote extends Sample {
    @Override
    void turnOn() {
        System.out.println("TV is turned ON.");
    }

    @Override
    void turnOff() {
        System.out.println("TV is turned OFF.");
    }
}
}

}

Day1 (JDK)

Infanta Mano — Fri, 04 Jul 2025 04:06:34 +0000

Java

Infanta Mano — Fri, 27 Jun 2025 03:51:39 +0000

int no = 10;
if(no >15) { // true or false
System.out.println("Hi...!");
}
else if(no >5) { // true
System.out.println("else if");
}
else if(no >6) {
System.out.println("else if 2");
}
else {
System.out.println("False");
}

if(no >5) // true or false
System.out.println("Hi...!");
Nantha Kumar
10:05 AM
System.out.println("Hiii ...!");
double purchaseAmount = 7500.0;
double discount;

    if(purchaseAmount >10000) {
        discount =20;
    }
    else if (purchaseAmount>5000){
        discount = 10;
    }
    else {
        discount =5;
    }

    System.out.println("Purchase Amount: " + purchaseAmount);
    double discountAmount = (purchaseAmount * discount) /100;
    System.out.println("Discount Amount: " + discountAmount);
    System.out.println("You have to pay : " + (purchaseAmount - discountAmount));

}

public static void main(String[] args) {

    // switch case

    int department = 2;

    switch(department) { // 2   
    case 1: // 2 == 1
        System.out.println("Welcome to HR team");
        break;
    case 2: 
        System.out.println("Welcome to finance Team");
        break;
    case 3: // 2==3
        System.out.println("welcome to unknown team");
        break;
    }

}

static void main(String[] args) {

    // switch case

    int department = 2;

    switch(department) { // 2   
    case 1: // 2 == 1
        System.out.println("Welcome to HR team");
        break;
    case 2: 
        System.out.println("Welcome to finance Team");
        break;
    case 3: // 2==3
        System.out.println("welcome to unknown team");
        break;
    }

}

ghp-ewse-rsopublic static void main(String[] args) {

    // switch case

    int department = 2;

    switch(department) { // 2   
    case 1: // 2 == 1
        System.out.println("Welcome to HR team");
        break;
    case 2: 
        System.out.println("Welcome to finance Team");
        break;
    case 3: // 2==3
        System.out.println("welcome to unknown team");
        break;
    }

public static void main(String[] args) {

    // switch case

    int department = 2;

    switch(department) { // 2   
    case 1: // 2 == 1
        System.out.println("Welcome to HR team");
        break;
    case 2: 
        System.out.println("Welcome to finance Team");
        break;
    case 3: // 2==3
        System.out.println("welcome to unknown team");
        break;
    }

}

Homework
public class Main {
public static void main(String[] args) {
int number = 10;

    if (number > 0) {
        System.out.println("The number is positive.");
    } else if (number < 0) {
        System.out.println("The number is negative.");
    } else {
        System.out.println("The number is zero.");
    }
}

}