In this post, you will learn different types of explained basic programs of JAVA for the Beginner level. Try all programs to clear the basic concept of the JAVA Program.
1. Program to compute Addition.
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import java.util.Scanner;
public class Addition {
public static void main(String[] args) { // TODO Auto-generated method stub Scanner
sc = new Scanner(System.in); int number1, number2, addtion; System.out.println("Please enter value of number1"); number1 = sc.nextInt(); // user input for
number1 System.out.println("Please enter value of number2"); number2 = sc.nextInt(); // user input for
number2 addtion = number1 + number2; // addition System.out.println("The sum of "+number1 + "
and " +number2 + " is " + addtion); } } |
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Output: Please enter value of number1 100 Please enter value of number2 150 The sum of 100 and 150 is 250 |
2. . Program on Area of circle and Rectangle
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import java.util.Scanner; public class AreaCalc { public static void main(String[] args) { double radius, areac; int length, breadth, arear; Scanner
sc = new Scanner(System.in); System.out.println("-----CIRCLE-----"); System.out.println("Enter radius of circle : "); radius = sc.nextDouble(); areac = 3.14 * radius * radius; System.out.println("Area of Circle is : " + areac); System.out.println("-----RECTANGLE-----"); System.out.println("Enter length and breadth of rectangle : "); length = sc.nextInt(); breadth = sc.nextInt(); arear = length * breadth; System.out.println("Area of Rectangle is : " + arear); sc.close(); } } |
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Output: -----CIRCLE----- Enter radius of circle : 4 Area of Circle is : 50.24 -----RECTANGLE----- Enter length and breadth of
rectangle : |
3. Program on Mod,Div Operator to check the number of notes in ATM Transaction
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import java.util.Scanner; public class ATMNotes { public static void main(String[] args) { // TODO Auto-generated method stub Scanner
sc = new Scanner(System.in); int amount; int notes; System.out.println("Enter amount : "); amount = sc.nextInt(); if (amount % 100 != 0) { System.out.println("Invalid amount entered"); }
else { if (amount >= 1000) { notes = amount / 1000; amount = amount % 1000; System.out.println("notes of 1000 : " + notes); } if (amount >= 500) { notes = amount / 500; amount = amount % 500; System.out.println("notes of 500 : " + notes); } if (amount >= 100) { notes = amount / 100; amount = amount % 100; System.out.println("notes of 100 : " + notes); } } } } |
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Output1: Enter amount : 250 Invalid amount entered |
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Output2: Enter amount : 1600 notes of 1000 : 1 notes of 500 : 1 notes of 100 : 1 |
4. Program to perform an arithmetic operation using switch case
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import java.util.Scanner; public class ArithmeticSwitch {
public static void main(String[] args) { // TODO Auto-generated method stub Scanner sc = new Scanner(System.in); int choice, a = 0, b = 0; int add, sub, mult; double div; do { System.out.println("1.Add\n2.Substract\n3.Multiply\n4.devide\n5.exit"); System.out.println("\nEnter yout choice"); choice = sc.nextInt(); System.out.println("enter value of a: "); a = sc.nextInt(); System.out.println("enter value of b: "); b = sc.nextInt(); switch (choice) { case 1: System.out.println("-----Addition-----"); add = a + b; System.out.println("Addition is " + add); break;
case 2: System.out.println("-----Subtraction-----"); sub = a - b; System.out.println("Subtraction is " + sub); break; case 3: System.out.println("-----Multiplication-----"); mult = a * b; System.out.println("Multiplication is " + mult); break; case 4: System.out.println("-----Division-----"); div = (double) a / b; System.out.println("division is " + div); break; case 5: System.out.println("Thank you..."); System.exit(0); break; default: System.out.println("U have entered wrong choice"); break; } } while (choice != 5); sc.close(); } } |
Output:
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1.Add 2.Substract 3.Multiply 4.devide 5.exit
Enter yout choice 1 enter value of a: 10 enter value of b: 25 -----Addition----- Addition is 35 1.Add 2.Substract 3.Multiply 4.devide 5.exit
Enter yout choice 2 enter value of a: 30 enter value of b: 5 -----Subtraction----- Subtraction is 25 1.Add 2.Substract 3.Multiply 4.devide 5.exit
Enter yout choice 3 enter value of a: 15 enter value of b: 6 -----Multiplication----- Multiplication is 90 1.Add 2.Substract 3.Multiply 4.devide 5.exit
Enter yout choice 4 enter value of a: 200 enter value of b: 16 -----Division----- division is 12.5 1.Add 2.Substract 3.Multiply 4.devide 5.exit
Enter yout choice 5 Thank you... |
5. Program to validate date,month and year using switch case.
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import java.util.Scanner; public class DateValidationSwitch {
public static void main(String[] args) { // TODO Auto-generated method stub Scanner
sc = new Scanner(System.in); int dd, mm, yyyy; int no_of_days = 0; System.out.println("Enter date(dd): "); dd = sc.nextInt(); System.out.println("Enter month(mm): "); mm = sc.nextInt(); System.out.println("Enter year(yyyy): "); yyyy = sc.nextInt(); switch (mm) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: no_of_days = 31; break; case 4: case 6: case 9: case 11: no_of_days = 30; break; case 2: if (yyyy % 4 == 0) { no_of_days = 29; System.out.println("This is leap year"); }
else { no_of_days = 28; } break; default: System.out.println("You have entered invalid month"); }// end switch if (dd <= no_of_days) { System.out.println("Given date is valid"); }
else { System.out.println("Given date is invalid"); } sc.close(); } } |
Output:
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Enter date(dd): 29 Enter month(mm): 02 Enter year(yyyy): 2016 This is leap year Given date is valid |
6. Program using increment , decrement and ternary operators
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public class IncrementDecrement { public static void main(String[] args) { int a=10,b=20,c,d,e,g,h,i; System.out.println("values before increment "+a+" and "+b); c = ++a; // pre
increment d = ++b; System.out.println("values after increment "+c+" and "+d); e= a>b ?++a:++b; System.out.println("turnary operator value "+e); g=e++; // post increment System.out.println("value after increment "+g); h=g--; System.out.println("value after decrement "+h); i=--h; System.out.println("value after decrement "+i); } } |
Output:
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values before increment 10 and 20 values after increment 11 and 21 turnary operator value 22 value after increment 22 value after decrement 22 value after decrement 21 |
7. Program to calculate percentage of marks and display the grade.
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import java.util.Scanner; public class GradeCalc { public static void main(String[] args) { Scanner
sc = new Scanner(System.in); double percentage, totalmarks; int math, eng, phys; System.out.println("enter your math score ="); math = sc.nextInt(); System.out.println("*************\nenter your eng score ="); eng = sc.nextInt(); System.out.println("*************\nenter your phys score ="); phys = sc.nextInt(); totalmarks = math + eng + phys; percentage = (double) (totalmarks / 300.0) * 100; System.out.println("your percentage : " + percentage); if (percentage >= 70) { System.out.println("Congrats... you got First class with Distinction"); }
else if (percentage < 70 && percentage >= 60) { System.out.println("Congrats... you got First class"); }
else if (percentage < 60 && percentage >= 40) { System.out.println("Congrats... you are passed"); }
else { System.out.println("Sorry... You are fail"); } sc.close(); }
} |
Output:
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enter your math score = 75 ************* enter your eng score = 80 ************* enter your phys score = 70 your percentage : 75.0 Congrats... you got First class
with Distinction |
8. Program to determine Prime Number.
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import java.util.Scanner; public class PrimeNumber { public static void main(String[] args) { Scanner
sc = new Scanner(System.in); int i, no; System.out.println("enter the no"); no = sc.nextInt(); for (i = 2; i <=
no; i++) { if (no % i == 0) break; } if (i == no) { System.out.println("Given number is a prime no"); }
else { System.out.println("Given number is not a prime no"); } sc.close(); } } |
Output:
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enter the no 79 Given number is a prime no |
9. Program on Fibonacci series
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import java.util.Scanner; public class FibonnacciSeries { public static void main(String[] args) { Scanner
sc = new Scanner(System.in); System.out.println("Enter the number for series : "); int num = sc.nextInt(); int p = 0, q = 1, r = 0, i; System.out.println("The fibonnacci series for number " + num + " is:"); for (i = 1; i < num; i++) { System.out.print(p + "
"); r = p + q; p = q; q = r; } } } |
Output:
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Enter the number for series : 5 The fibonnacci series for number 5
is: 0 1 1 2 |
10. Program on Reverse Number
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import java.util.Scanner; public class ReverseNumber { public static void main(String args[]) { int original, reverse = 0, number; Scanner
in = new Scanner(System.in); System.out.println("Enter a number "); number = in.nextInt(); original = number; while (number != 0) { reverse = reverse * 10; reverse = reverse + number % 10; number = number / 10; } System.out.println("Reverse number : " + reverse); } } |
Output:
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Enter a number 456 Reverse number : 654 |
11. Program to check number as Palindrome
/* A number is palindrome if the number and its reverse is same*/
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import java.util.Scanner; public class PalindromeNumber { public static void main(String args[]) { int original, reverse = 0, number; Scanner
in = new Scanner(System.in); System.out.println("Enter a number to check if it is a palindrome"); number = in.nextInt(); original = number; while (number != 0) { reverse = reverse * 10; reverse = reverse + number % 10; number = number / 10; } System.out.println("Reverse number : " + reverse); if (original == reverse) { System.out.println("Numebr is palindrome"); } } } |
Output:
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Enter a number to check if it is a
palindrome 121 Reverse number : 121 Numebr is palindrome |
12. Program on Armstrong Number
/* Armstrong number is an integer such that the sum of the cubes of its digits is equal to the number itself.*/
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import java.util.Scanner; public class ArmstrongNumber { public static void main(String arg[]) { Scanner
sc = new Scanner(System.in); int no, rem = 0, x = 0; System.out.println("enter the number to check for armstrong"); no = sc.nextInt(); int p = no; while (no > 0) { rem = no % 10; x = x + (rem * rem * rem); no = no / 10; } if (p == x) { System.out.println("this is an armstrong"); }
else { System.out.println("This is not an armstrong number"); } sc.close(); } } |
Output:
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enter the number to check for
armstrong 371 this is an armstrong |
13. Programs on patterns:
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public class Pattern1 { public static void main(String[] args) { for (int i = 1; i <=
5; i++) { for (int j = 1; j <=
5; j++) { System.out.print(i); } System.out.println(""); } } } |
Output:
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11111 22222 33333 44444 55555 |
2. Pattern Sample
12345
12345
12345
12345
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public class ForSeries1 { public static void main(String[] args) { for (int i = 1; i <=
5; i++) { for (int j = 1; j <=
5; j++) { System.out.print(j); } System.out.println(" "); } } } |
Output:
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12345 12345 12345 12345 12345 |
3.
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public class Pattern2 { public static void main(String args[]) { for (int i = 1; i <=
5; i++) { for (int j = 1; j <=
i; j++) { System.out.print(i); } System.out.println(""); } } } |
Output:
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1 22 333 4444 55555 |
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public class Forseries3 { public static void main(String[] args) { int i, j, k; { for (i = 0; i <
5; i++) { for (k = 5; k > i; k--) { System.out.print(" "); } for (j = 0; j < i; j++) { System.out.print("*"); System.out.print(" "); } System.out.println(""); } for (i = 0; i <
5; i++) { for (k = 0; k < i; k++) { System.out.print(" "); } for (j = 5; j > i; j--) { System.out.print("*"); System.out.print(" "); } System.out.println(""); } } } } |
Output:
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*
* *
* * * * * * * * * * * * * * * *
* * *
* * * |
5.
1 2 1
1 2 3 2 1
1 2 3 4 3 2 1
1 2 3 4 5 4 3 2 1
1 2 3 4 5 6 5 4 3 2 1
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public class Forloopdemo {
public static void main(String[] args) { int i, j, k = 0; for (i = 1; i <=
5; i++) { for (int m = 5; m >=
i; m--) { System.out.print(" "); } for (j = 1; j <=
i; j++) { System.out.print(j); System.out.print(" "); } for (k = j; k > 0; k--) { System.out.print(k); System.out.print(" "); } System.out.println(); } } } |
Output:
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1 2 1
1 2 3 2 1
1 2 3 4 3 2 1
1 2 3 4 5 4 3 2 1 1 2 3 4 5 6 5 4 3 2 1 |
6.
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public class For_demo { public static void main(String[] args) { int k = 5; for (int i = 0; i <
5; i++) { for (int m = 0; m < i; m++) { System.out.print(" "); } for (int j = 0; j <
5; j++) { if (i == j) { System.out.print(k); k--; } } System.out.println(""); } } } |
Output:
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5 4
3
2 1 |
Above all the basic programs explained with all type of concept, by doing these programs you can know the basic concept of the JAVA programming. For more basic programs in Java Click Here.
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