public class Switch1 { public static void main(String[] args) { int x=3; switch(x) { case 0: System.out.println("0"); break; case 1: System.out.println("1"); break; case 2: System.out.println("2"); break; case 3: System.out.println("3"); break; default: System.out.println("Differt Number"); } } }
Output
3
public class Switch2 { public static void main(String[] args) { int x=1; switch(x) { case 0: System.out.println("John"); break; case 1: System.out.println("Anne"); break; case 2: System.out.println("Peter"); break; default: System.out.println("Differt"); } } }
Output
Anne
public class Switch1 { public static void main(String[] args) { switch(0) { case 0: System.out.println("John"); break; case 1: System.out.println("Anne"); break; case 2: System.out.println("Peter"); break; default: System.out.println("Different "); } } }
Output
John
public class Switch2 { public static void main(String[] args) { switch(1) { case 0: System.out.println("John"); case 1: System.out.println("Anne"); case 2: System.out.println("Peter"); default: System.out.println("Differt "); } } }
Output
Anne
Peter
Differt
Example of Calculator
import java.util.*; class Example{ public static void main(String args[]){ Scanner input = new Scanner(System.in); System.out.print("Enter Number 1 : "); int number1 = input.nextInt(); System.out.print("Enter Number 2 : "); int number2 = input.nextInt(); System.out.println(); System.out.println("A. Adition"); System.out.println("B. Subtraction"); System.out.println("C. Division"); System.out.println("D. Multiplication."); System.out.println(); System.out.print("Please select one option : "); String option = input.next(); System.out.println(); switch(option){ case "A": System.out.println("Add : " + (number1 + number2)); break; case "B": if(number1 > number2){ System.out.println("Sub : " + (number1 - number2)); }else{ System.out.println("Sub : " + (number2 - number1)); } break; case "C": if(number1 > number2){ System.out.println("Sub : " + (number1/number2)); }else{ System.out.println("Sub : " + (number2/number1)); } break; case "D": System.out.println("Multi : " + (number1 * number2)); break; default : System.out.println("Please select valid option"); } } }
Output
Enter Number 1 : 45
Enter Number 2 : 67
A. Adition
B. Subtraction
C. Division
D. Multiplication.
Please select one option : A
Add : 112
Grade Calculation
import java.util.*; class Example{ public static void main(String args[]){ Scanner input = new Scanner(System.in); System.out.print("Enter Student Name : "); String name = input.next(); System.out.print("Enter Student Address : "); String address = input.next(); System.out.print("Enter Number of Subjects : "); int number_of_subjects = input.nextInt(); System.out.println(); int marks = 0; int max = 0; int total = 0; for(int i = 0 ; i < number_of_subjects ; i++){ System.out.print("Enter Subject " + (i + 1) + " Marks : "); marks = input.nextInt(); if(max < marks){ max = marks; } total = total + marks; } boolean flag = true; while(flag){ System.out.println(); System.out.println("A. Show Student Details."); System.out.println("B. Show Maximum Marks."); System.out.println("C. Show Total, Average & Result."); System.out.println("X. Exit."); System.out.println(); System.out.print("Please select one option : "); String option = input.next(); System.out.println(); switch(option){ case "A": System.out.println("Student Name : " + name); System.out.println("Student Address : " + address); break; case "B": System.out.println("Maximum Marks : " + max); break; case "C": double average = total / (double)number_of_subjects; String result = "Fail"; if(average >= 50){ result = "Pass"; } System.out.println("Total : " + total); System.out.println("Average : " + average); System.out.println("Result : " + result); break; case "X": System.out.println("Good bye...."); flag = false; break; default : System.out.println("Please select valid option."); } } } }
Output
Enter Student Name : Raja
Enter Student Address : India
Enter Number of Subjects : 5
Enter Subject 1 Marks : 60
Enter Subject 2 Marks : 80
Enter Subject 3 Marks : 60
Enter Subject 4 Marks : 45
Enter Subject 5 Marks : 60
A. Show Student Details.
B. Show Maximum Marks.
C. Show Total, Average & Result.
X. Exit.
Please select one option : A
Student Name : Raja
Student Address : India
A. Show Student Details.
B. Show Maximum Marks.
C. Show Total, Average & Result.
X. Exit.
Please select one option :
class Example{ public static void main(String args[]){ for(int i = 1 ; i <= 10 ; i++){ if(i == 5){ break; } System.out.println(i); } System.out.println("Hello Java"); } }
Output
1
2
3
4
Hello Java
class Example{ public static void main(String args[]){ for(int i = 1 ; i <= 10 ; i++){ if(i == 5){ return; } System.out.println(i); } System.out.println("Hello Java"); } }
Output
1
2
3
4
class Example{ public static void main(String args[]){ for(int i = 1 ; i <= 10 ; i++){ if(i == 5){ continue; } System.out.println(i); } System.out.println("Hello Java"); } }
Output
1
2
3
4
6
7
8
9
10
Hello Java
import java.util.*; class Example{ public static void main(String args[]){ Scanner input = new Scanner(System.in); int marks = 0; int total = 0; for(int i = 0 ; i < 5 ;){ System.out.print("Enter Subject " + (i + 1) + " Marks : "); marks = input.nextInt(); System.out.println(); if(marks > 100){ System.out.println("Invali Marks..."); System.out.println("Please Re-Enter..."); System.out.println(); continue; }else if(marks < 0){ System.out.println("Invali Marks..."); System.out.println("Please Re-Enter..."); System.out.println(); continue; } total = total + marks; i++; } System.out.println("Total : " + total); } }
Output
Enter Subject 1 Marks : 67
Enter Subject 2 Marks : 89
Enter Subject 3 Marks : 54
Enter Subject 4 Marks : 67
Enter Subject 5 Marks : 89
Total : 366
class Example{ public static void main(String args[]){ String word = "Apple"; String word2 = "Apple"; if(word == word2){ System.out.println("Same"); }else{ System.out.println("Not Same"); } } }
Output
Same
import java.util.*; class Example{ public static void main(String args[]){ Scanner input = new Scanner(System.in); int[] number = new int[5]; for(int i = 0 ; i < 5 ; i++){ System.out.print("Enter Number " + (i + 1) + " : "); number[i] = input.nextInt(); } System.out.println(); System.out.print("All Numbers : [ "); for(int i = 0 ; i < number.length ; i++){ System.out.print(number[i] + " "); } System.out.println("]"); } }
Output
Enter Number 1 : 56
Enter Number 2 : 78
Enter Number 3 : 45
Enter Number 4 : 67
Enter Number 5 : 89
All Numbers : [ 56 78 45 67 89 ]
import java.util.*; class Example{ public static void main(String args[]){ Scanner input = new Scanner(System.in); while(true){ System.out.print("Do you want to add new Student.? (Y/N) : "); String letter = input.next(); System.out.println(); switch(letter){ case "Y": System.out.print("Enter Student Name : "); String name = input.next(); System.out.print("Enter Student Address : "); String address = input.next(); System.out.print("Enter Number of Subjects : "); int number_of_subjects = input.nextInt(); System.out.println(); int[] marks = new int[number_of_subjects]; int max = 0; int total = 0; for(int i = 0 ; i < number_of_subjects ;){ System.out.print("Enter Subject " + (i + 1) + " Marks : "); marks[i] = input.nextInt(); if(marks[i] > 100){ System.out.println("Marks is Grater than 100."); System.out.println(); continue; } if(max < marks[i]){ max = marks[i]; } total = total + marks[i]; i++; } boolean flag = true; while(flag){ System.out.println(); System.out.println("A. Show Student Details."); System.out.println("B. Show All Marks."); System.out.println("C. Show Maximum Marks."); System.out.println("D. Show Total,Average & Result."); System.out.println("X. Exit."); System.out.println(); System.out.print("Please select one option : "); letter = input.next(); System.out.println(); switch(letter){ case "A": System.out.println("Student Name : " + name); System.out.println("Student Address : " + address); break; case "B": for(int i = 0 ; i < marks.length ; i++){ System.out.println("Subject " + (i + 1) + " Marks : " + marks[i]); } break; case "C": System.out.println("Maximum marks : " + max); break; case "D": double average = (double)total / number_of_subjects; String result = "pass"; if(average < 50){ result = "Fail"; } System.out.println("Total : " + total); System.out.println("Average : " + average); System.out.println("Result : " + result); break; case "X": System.out.println("Have a nice day..!"); flag = false; break; default : System.out.println("Please select valid option.."); } } break; case "N": System.out.println("Good bye...."); return; default : System.out.println("Please enter valid letter.."); } System.out.println(); } } }
Output
Do you want to add new Student.? (Y/N) : Y
Enter Student Name : John
Enter Student Address : India
Enter Number of Subjects : 3
Enter Subject 1 Marks : 78
Enter Subject 2 Marks : 89
Enter Subject 3 Marks : 54
A. Show Student Details.
B. Show All Marks.
C. Show Maximum Marks.
D. Show Total,Average & Result.
X. Exit.
Please select one option : A
Student Name : John
Student Address : India
A. Show Student Details.
B. Show All Marks.
C. Show Maximum Marks.
D. Show Total,Average & Result.
X. Exit.
Please select one option : A
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