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All Java Programs - fdsafgdfg trhthtr hdFf
Software Engineering (CS530)
Visvesvaraya Technological University
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Program 1:
import static java.lang.Math; import java.util; public class Quadratic { public static void main(String[] args) { // TODO code application logic here Scanner sc=new Scanner(System); double a,b,c; //Quadratic Variables declaration System.out("Enter the value of a.."); a=sc(); //Quadratic Variables Initialization System.out("Enter the value of b.."); b=sc(); //Quadratic Variables Initialization System.out("Enter the value of c.."); c=sc(); //Quadratic Variables Initialization if(a==0 || (a==0 && b==0)) { System.out("Roots cant'b computed"); } else { double det=(bb)-(4a*c); //Find the determinant
double r=2*a;
//Check for Roots
if(det>0) { System.out("Roots are real and unequal"); double root1 = (-b + Math((det))) / (2 * a); double root2 = (-b - Math((det))) / (2 * a); System.out("Roots are.."); System.out("Root1:"+root1); System.out("Root2:"+root2); } else if(det==0) { System.out("The roots of the quadratic equation are real and equal."); double root=(-b)/r; System.out("Root:"+root); } else { System.out("The roots of the quadratic equation are complex and different"); double realPart = -b / (2 * a); double imagPart = Math(abs(det)) / (2 * a); System.out("Roots are "); System.out(realPart+" +i" + imagPart); System.out(realPart+" -i" + imagPart); } }
System.out("Phone No of the Student :"+ phoneNo); } } public class StudentDemo /* class which contains main method / { public static void main(String [] args) { int nStudent,ch; / create new instance of Scanner class to read the input from console / Scanner in = new Scanner(System); System.out("Enter the no of student objects to be created"); nStudent = in(); / Declare array of student type */ Student stud [] = new Student [nStudent]; while(true) { System.out("1:Create Student Data"); System.out("2:Print Student Data"); System.out("3:Exit"); ch = in();
switch(ch) { case 1 :
for(int i=0;i<nStudent;i++) { System.out("Read the Student" +" "+(i+1)+" Details");
in(); System.out("Enter the name of the student"); String name = in(); System.out("Enter the usn of the student"); String usn = in(); System.out("Enter the branch of the student"); String branch = in(); System.out("Enter the phoneNo of the student"); long phoneNo = in(); /* create the object of student type */ stud[i] = new Student(usn,name,branch,phoneNo);
} break; case 2 : for(int i=0;i<nStudent;i++) { System.out("Details of Student"+" "+(i+1)+" is \n");
stud[i].printStudentData();
count++; } } if(count>2) { System.out("The number"+' '+num+' '+"is not a prime number"); } else { System.out("The number"+' '+num+' '+"is a prime number"); }
}
} Calculator: import java.; import java.; import java.lang; import java.util; public class BasicCalculator { public static void main(String[] args)
{
// stores two numbers double num1, num2; // Take input from the user Scanner sc = new Scanner(System); System.out("Enter the numbers"); // take the inputs num1 = sc(); num2 = sc(); System.out("Enter the operator (+,-,*,/)");char op = sc().charAt(0); double o = 0; switch (op) { // case to add two numberscase '+': o = num1 + num2; break; // case to subtract two numberscase '-': o = num1 - num2; break;
// print the final result System.out(num1 + " " + op + " " + num
- " = " + o); } }
Program 4:
import java.util;
class Staff {
int staffId; String name; long phoneNo;int salary; /* Scanner class to read from console / Scanner in = new Scanner(System); / Method to read the Staff data */void accept() {
System.out("Enter the name of the staff");name = in(); System.out("Enter the staffId"); staffId = in(); System.out("Enter the phoneNo");phoneNo = in(); System.out("Enter the salary"); salary = in(); } /* Method to display the Staff data */
void display() { System.out("--------------------------------- "); System.out("StaffId:" + " " + staffId); System.out("Name: " + " " + name); System.out("PhoneNo: " + " " + phoneNo); System.out("Salary: " + " " + salary); } } /* Inheritance of Staff class by StaffTeaching class */class StaffTeaching extends Staff
System.out("Domain: " + domain);
System.out("Publications:");
for (int i = 0; i < publications; i++) {
System.out(publications[i]);
}
}
}
/*Subclass 2 */ class StaffTechnical extends Staff { private String[] skills; public void accept() { super(); Scanner scanner = new Scanner(System); System.out("Enter Number of Skills: "); int n = scanner(); skills = new String[n]; System.out("Enter Skills:"); for (int i = 0; i < n; i++) { skills[i] = scanner(); } }
public void display() { super(); System.out("Skills:"); for (int i = 0; i < skills; i++) { System.out(skills[i]); }
}
public class StaffDemo { public static void main(String [] args) {
//Declare an array of type StaffTeaching,StaffTechnical and StaffContract
StaffTeaching stt[] = new StaffTeaching[3]; StaffTechnical stec[] = new StaffTechnical[3]; StaffContract stc[] = new StaffContract[3]; System.out("Read Teaching Staff Details");for(int i=0;i<3;i++) { stt[i] = new StaffTeaching(); System.out("Enter the Teaching Staff " + (i+1)+ " details");
stt[i].accept(); } System.out("Read Technical Staff Details");for(int i=0;i<3;i++) { stec[i] = new StaffTechnical(); System.out("Enter the Technical Staff " + (i+1)+ " details"); stec[i].accept(); } System.out("Read Contract Staff Details"); for(int i=0;i<3;i++) {
stc[i] = new StaffContract(); System.out("Enter the Contract Staff " + (i+1)+ " details"); stc[i].accept(); }
for(int i=0;i<3;i++) { System.out("Details of Teaching Staff "+(i+1) +" is:" );stt[i].display(); }
for(int i=0;i<3;i++) { System.out("Details of Technical Staff " +" "+ (i+1) + " is:" );stec[i].display(); }
for(int i=0;i<3;i++) { System.out("Details of Contract Staff " +" "+ (i+1) + " is:" ); stc[i].display(); } } }
Program 5:
marks3=m3;
}
// copy constructor
student(student s)
{
name=s;
regno=s;
marks1=s;
marks2=s;
marks3=s;
}
void display()
{
System.out(name + "\t" +regno+ "\t" +marks1+ "\t"
+marks2+ "\t" + marks3+"\n");
}
}
class HelloWorld {
public static void main(String[] args) {
student s1=new student();
student s2=new student("john",34266,58,96,84);
student s3=new student(s1);
s1();
s2();
s3();
}
}
Method Overloading:
class DisplayOverloading
{
//adding two integer numbers
int add(int a, int b)
{
int sum = a+b;
return sum;
}
//adding three integer numbers
int add(int a, int b, int c)
{
int sum = a+b+c;
return sum;
}
float add(float a,float b)
All Java Programs - fdsafgdfg trhthtr hdFf
Course: Software Engineering (CS530)
University: Visvesvaraya Technological University
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