java inheritance example to show SalriedWorker, DailyWorker salary details

import java.io.*;
import java.util.Scanner;
class Worker{
String name;
double salaryrate;
public void setdata(String s,double a){
name=s;
salaryrate=a;
}
public double ComPany(int hours){
return salaryrate*hours;
}
}
class DailyWorker extends Worker{
public void getsalary(int days){
int k=days*12;
System.out.println("salary of the DailyWorker is"+ComPany(k));
}
}
class SalariedWorker extends Worker{
public void getsalary(int hours)
{ int m=hours;
System.out.println("salary of the SalriedWorker is"+ComPany(m));
}
}
class WorkerMain{
public static void main(String args[]){
Scanner in=new Scanner(System.in);
String n;
double salaryrate;
int days,hours,ch;
System.out.println("Enter 1 for Daily Worker \n 2 for Salried Employee");
ch=in.nextInt();
switch(ch){
case 1:DailyWorker d=new DailyWorker();
System.out.println("enter the Name");
n=in.nextLine();
System.out.println("\nenter the salary rate");
salaryrate=in.nextDouble();
d.setdata(n,salaryrate);
System.out.println("\nenter the no. of days of work");
days=in.nextInt();     
d.getsalary(days);
break;
case 2:
SalariedWorker s=new SalariedWorker();
System.out.println("enter the Name");
n=in.nextLine();

System.out.println("\nenter the salary rate");
salaryrate=in.nextDouble();
s.setdata(n,salaryrate);
s.getsalary(40);
break;
}
}
}

inheritance example in java to show the trunk call ,normal call and Urgent calls rates

import java.util.Scanner;
import java.io.*;
class Trunk_Call{
double rate;
public void setrates(int rate){
this.rate=rate;
}
public double getcharges(double duration){
return rate*duration;
}
}
class Ordinary extends Trunk_Call{
void charges(double time){
double t=time;
System.out.println("charges for ordinary calls are"+getcharges(t));
}
}
class Urgent extends Trunk_Call{
void charges(double time){
double t=time;
System.out.println("charges for Urgent calls are"+getcharges(t));
}
}
class Lightning extends Trunk_Call{
void charges(double time){
double t=time;
System.out.println("charges for Lightning calls  are"+getcharges(t));
}
}
class TrunkMain{
public static void main(String args[]){
Scanner in=new Scanner(System.in);
int ch,a,b,rate,time;
System.out.println("Enter 1 for ordinary call \n 2 for Urgent call \n 3 for Lightning");
ch=in.nextInt();
switch(ch){
case 1:Ordinary o=new Ordinary();
      System.out.println("enter the rates");
       rate=in.nextInt();
       o.setrates(rate);
       System.out.println("enter the time in sec. for call");
       time=in.nextInt();      
     o.charges(time);
break;
case 2:Urgent u=new Urgent();
      System.out.println("enter the rates");
       rate=in.nextInt();
       u.setrates(rate);
       System.out.println("enter the timein sec. for call");
       time=in.nextInt();      
     u.charges(time);
break;
case 3:Lightning l=new Lightning();
      System.out.println("enter the rates");
       rate=in.nextInt();
       l.setrates(rate);
       System.out.println("enter the time in sec. for call");
       time=in.nextInt();      
     l.charges(time);
break;
}
}
}

java program to print student details

import java.io.*;
class Student
{
private String  name;
private String SapID;

public void display(){
System.out.println("Hello From Base class");
}
}
class StudentDetail extends Student{
public void setdata(String s,String r){
name=s;
SapID=r;
System.out.println("Name="+name+" SAPID="+SapID);
}

public static void main(String args[]){
StudentDetail d=new StudentDetail();
d.setdata("Nikhil" , "500017137");
d.display();
}
}

java program to show th concept of inheritance

class Player
{
public String name;
public String Country;
public int JersyNo;
public int age;
public void setdata(String a,String b,int c,int d)
{
name=a;
Country=b;
JersyNo=c;
age=d;
}
public void getdata()
{
System.out.println("Name is"+name);
System.out.println("Country is is"+Country);
System.out.println("JersyNo is"+JersyNo);
System.out.println("Age is"+age);
}
}
class Cricket_Player extends Player
{
public void setdata(String a,String b,int c,int d)
{
name=a;
Country=b;
JersyNo=c;
age=d;
}
}
class Football_Player extends Player
{
public void setdata(String a,String b,int c,int d)
{
name=a;
Country=b;
JersyNo=c;
age=d;
}
}
class Hockey_Player extends Player
{
public void setdata(String a,String b,int c,int d)
{
name=a;
Country=b;
JersyNo=c;
age=d;
}

}
class PlayerMain
{
public static void main(String args[])
{
Player p=new Player();
Cricket_Player c=new Cricket_Player();
System.out.println("Detail of Cricket player is");
c.setdata("Rahul Dravid","India",19,40);
c.getdata();
System.out.println("Detail of Hockey player is");
Hockey_Player h=new Hockey_Player();
h.setdata("Sandeep singh","India",4,26);
h.getdata();
System.out.println("Detail of Football player is");
Football_Player f=new Football_Player();
f.setdata("Cristiano Ronaldo","PORTUGAL",23,30);
f.getdata();
}
}

constructor and function example in java

class Employee{
double salary,gross,tax=0;
String name,empid;

public Employee(){
gross=0;
tax=0;
salary=0;
name="null";
empid="null";
}
public Employee(String nme,String eid,double sal){
salary=sal;
empid=eid;
name=nme;
}
public double increase_Salary(double percent){
return salary=(salary+((percent*salary)/100));

}
public double calculate_tax(){

if(salary>=100000&& salary<150000){
tax=(10*(salary/100));
}
else if(salary>=150000){
tax=(20*(salary/100));
}
return tax;

}

public double gross_salary(){
if(salary>=100000&& salary<150000){
gross=(salary-(10*(salary/100)));
}
else if(salary>=150000){
gross=salary-(20*(salary/100));
}
return gross;
}

public void display(){
for (int i=1;i<=12;i++){
if(i==1){
System.out.println(i+" "+name+" "+"JAN"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==2){
System.out.println(i+" "+name+" "+"FEB"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==3){
System.out.println(i+" "+name+" "+"MAR"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==4){
System.out.println(i+" "+name+" "+"APR"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==5){
System.out.println(i+" "+name+" "+"MAY"+" "+empid+" "+salary+" "+(calculate_tax()/12)+" "+(gross_salary()/12)+" "+(increase_Salary(20)/12));
}
if(i==6){
System.out.println(i+" "+name+" "+"JUN"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==7){
System.out.println(i+" "+name+" "+"JUL"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==8){
System.out.println(i+" "+name+" "+"AUG"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==9){
System.out.println(i+" "+name+" "+"SEP"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==10){
System.out.println(i+" "+name+" "+"OCT"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==11){
System.out.println(i+" "+name+" "+"NOV"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
if(i==12){
System.out.println(i+" "+name+" "+"DEC"+" "+empid+" "+(salary/12)+" "+(calculate_tax()/12)+" "+(gross_salary()/12));
}
}
}
public static void main(String[] args){

Employee emp=new Employee("Nikhil Jain","R101",2400000);
emp.display();
}
}

java program to show conversion of string to float ,int and vice versa

1) integer
public class Convert{
public static void main(String[] args){
System.out.println("****Conversion of Int to Integer****");
int i=10;
Integer z= Integer.valueOf(i);
System.out.println("Value of z="+i);
System.out.println("****Conversion of Integer to String****");
String s;
s= Integer.toBinaryString(12);
System.out.println("Value of s is "+s);
System.out.println("****Conversion of Integer to Int****");
Integer y= new Integer(12);
int x= y.intValue();
System.out.println("Value of x"+x);
System.out.println("****Conversion of String to Int****");
double a= Double.parseDouble("123.123");
int k=(int)a;
System.out.println("Value of k="+k);
System.out.println("****Conversion of String to Integer****");
short v= Short.parseShort("10011",2);
Integer b= new Integer(v);
System.out.println("Value of b="+b);
System.out.println("****Conversion of Int to String****");
int e=10;
Integer g= new Integer(e);
String f= Integer.toString(213);
System.out.println("Value of f is "+f);
}
}


2)float


public class Conversion{
public static void main(String[] args){
System.out.println("****Conversion of Float to float****");
float f= new Float("123.23");
System.out.println("Value of f="+f);
System.out.println("****Conversion of Float to String****");
Float g= new Float(123.123);
String y= String.valueOf(g);
System.out.println("Value of y is "+y);
System.out.println("****Conversion of String to Float****");
Float k= Float.valueOf("170.78");
System.out.println("Value of k="+k);
System.out.println("****Conversion of String to float****");
float z= Float.parseFloat("71.11");
System.out.println("Value of z="+z);
System.out.println("****Conversion of float to Float****");
float a=122.24f;
Float x= Float.valueOf(a);
System.out.println("Value of x"+x);
System.out.println("****Conversion of float to String****");
float h=18.45f;
String s= String.valueOf(h);
System.out.println("Value of s is "+s);
}

}

java program to check a letter is present in the string or not

import java.util.*;
public class CheckString
{
public static void main(String args[])
{
String s1;
char s2='a';
int count=0,j=0;
int arr[]=new int[25];
System.out.println("Enter your name");
Scanner in=new Scanner(System.in);
s1=in.nextLine();
int len=s1.length();
for(int i=0;i<len;i++)
{
if(s1.charAt(i)==s2)
{
count++;
arr[j]=i;
j++;
}
}
System.out.println("You name contains\t"+count+" times a \n");
System .out.println("a is present at following locations\n");
for(int k=0;k<j;k++)
{
System.out.println(arr[k]);
}
}
}