Complete Java Project with Source Code and Documentation

Java Projects With Complete Code


1. Calculator App
import java.util.Scanner;

public class Calculator {
public static void main(String[] args)

{ Scanner sc = new

Scanner(System.in);

System.out.println("Enter first
number:"); double a =
sc.nextDouble();

System.out.println("Enter second
number:"); double b = sc.nextDouble();

System.out.println("Choose Operation (+, -,
*, /):"); char op = sc.next().charAt(0);

double result =

0; switch(op) {
case '+':
result = a +
b; break;

case '-':
result = a -
b; break;

case '*':
result = a *
b; break;

case '/':
result = a /
b; break;

, default:
System.out.println("Invalid
Operator"); return;
}

System.out.println("Result = " + result);
}
}




2. Number Guessing Game
import
java.util.Random;
import
java.util.Scanner;

public class GuessNumber {
public static void main(String[]
args) {

Random rand = new Random();
int number = rand.nextInt(100) +

1; Scanner sc = new

Scanner(System.in); int guess;

do {
System.out.println("Guess a number (1-
100):"); guess = sc.nextInt();

if(guess > number) {
System.out.println("Too
High!");
}
else if(guess < number) {
System.out.println("Too Low!");
}
else {
System.out.println("Correct Number!");
}

} while(guess != number);
}
}

, 3. Student Grade Calculator
import java.util.Scanner;

public class GradeCalculator {
public static void main(String[] args)

{ Scanner sc = new

Scanner(System.in);

System.out.println("Enter
marks:"); int marks =
sc.nextInt();

if(marks >= 90)
{ System.out.println("Gra
de A");
}
else if(marks >= 75)
{ System.out.println("Gra
de B");
}
else if(marks >= 50)
{ System.out.println("Gra
de C");
}
else {
System.out.println("Fail");
}
}
}




4. Simple ATM Program
import

java.util.Scanner;

public class ATM {

public static void main(String[] args)

{ Scanner sc = new