String Functions :
package com.company.yash;
public class stringFuntions {
public static void main(String[] args) {
//String Funtions
// Here we are creating the strings
String first = "Java ";
String second = "Python ";
String third = "JavaScript ";
// Printing the strings we have created above
System.out.println(first); // print Java
System.out.println(second); // print Python
System.out.println(third); // print JavaScript
// Lenght oF Strings
System.out.println("length :" + third.length() ); //finding the lenth of javacript
// Join Two Strings
//first way
System.out.println(first + " and " + third + " Both are different languages");
//second way
System.out.println(first.concat(second));
//Compare two Strings
String first1 = "java programming";
String second1 = "ython programming";
// compare first and second strings
boolean result1 = first1.equals(second1);
System.out.println("Strings first and second are equal: " + result1);
}
}
String Array :
package com.company.yash;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class StringArray {
public static void main(String[] args)
{
// Defining a String Array
String sa[] = { "A", "B", "C", "D", "E", "F" };
//
System.out.println("Initial Array:\n" + Arrays.toString(sa));
String ne = "G"; // Define new element to add
List<String> l = new ArrayList<String>(Arrays.asList(sa)); // Convert Array to ArrayList
l.add(ne); // Add new element in ArrayList l
sa = l.toArray(sa); // Revert Conversion from ArrayList to Array
// printing the new Array
System.out.println("Array with added Value: \n" + Arrays.toString(sa)) ;
}
}
Int Array :
package com.company.yash;
public class intarray {
public static void main(String args[]){
int a[]=new int[5];//declaration and instantiation
a[0]=10;//initialization
a[1]=20;
a[2]=70;
a[3]=40;
a[4]=50;
//traversing array
for(int i=0;i<a.length;i++)//length is the property of array
System.out.println(a[i]);
}
}
Merging Array :
package com.company.yash;
public class Mergingarray {
public static void main(String[] args)
{
int firstArray[] = { 11,22,33,44,55,98,76,54,60};
int secondArray[] = {66,77,88,99,22,67,21,90,80,70};
int source_arr[], sourcePos, dest_arr[], destPos, len;
source_arr = firstArray;
dest_arr = secondArray;
sourcePos = 2;
destPos = 4;
len = 3;
// Print elements of source
System.out.print("source_array : ");
for (int i = 0; i < firstArray.length; i++)
System.out.print(firstArray[i] + " ");
System.out.println("");
System.out.println("sourcePos : " + sourcePos);
// Print elements of destination
System.out.print("dest_array : ");
for (int i = 0; i < secondArray.length; i++)
System.out.print(secondArray[i] + " ");
System.out.println("");
System.out.println("destPos : " + destPos);
System.out.println("len : " + len);
//invoking arraycopy() method
System.arraycopy(source_arr, sourcePos, dest_arr,destPos, len);
// Print elements of destination after
System.out.print("Resultant array : ");
for (int i = 0; i < secondArray.length; i++)
System.out.print(secondArray[i] + " ");
}
}
Pure Impure Fun :
package com.company.yash;
class Myclass{
int num = 5;
}
public class pureimpure {
public static void main(String[] args) {
Myclass obj = new Myclass(); //num = 5
update(obj);
display(obj);
}
public static void update(Myclass ob) { //impure Function
ob.num++;
}
public static void display(Myclass obj){ //Pure Funtion
System.out.println("Result : " + obj.num);
}
}
Math Functions :
package com.company.yash;
public class mathFunctions {
public static void main(String[] args) {
double x = 28;
double y = 4;
double angle = 30;
// return the maximum of two numbers
System.out.println("Maximum number of x and y is: " +Math.max(x, y));
// return the square root of y
System.out.println("Square root of y is: " + Math.sqrt(y));
//returns 28 power of 4 i.e. 28*28*28*28
System.out.println("Power of x and y is: " + Math.pow(x, y));
// return the logarithm of given value
System.out.println("Logarithm of x is: " + Math.log(x));
System.out.println("Logarithm of y is: " + Math.log(y));
// return the logarithm of given value when base is 10
System.out.println("log10 of x is: " + Math.log10(x));
System.out.println("log10 of y is: " + Math.log10(y));
// return the log of x + 1
System.out.println("log1p of x is: " +Math.log1p(x));
// return a power of 2
System.out.println("exp of a is: " +Math.exp(x));
// return (a power of 2)-1
System.out.println("expm1 of a is: " +Math.expm1(x));
// converting values to radian
double b = Math.toRadians(angle);
// return the trigonometric sine of a
System.out.println("Sine value of a is: " +Math.sin(angle));
// return the trigonometric cosine value of a
System.out.println("Cosine value of a is: " +Math.cos(angle));
// return the trigonometric tangent value of a
System.out.println("Tangent value of a is: " +Math.tan(angle));
// return the trigonometric arc sine of a
System.out.println("Sine value of a is: " +Math.asin(angle));
// return the trigonometric arc cosine value of a
System.out.println("Cosine value of a is: " +Math.acos(angle));
// return the trigonometric arc tangent value of a
System.out.println("Tangent value of a is: " +Math.atan(angle));
// return the hyperbolic sine of a
System.out.println("Sine value of a is: " +Math.sinh(angle));
// return the hyperbolic cosine value of a
System.out.println("Cosine value of a is: " +Math.cosh(angle));
// return the hyperbolic tangent value of a
System.out.println("Tangent value of a is: " +Math.tanh(angle));
}
}
Constructor :
package com.company.yash;
public class constructor {
//creating a default constructor
// constructor(){
// System.out.println("FAANG IS MY DREAM JOB");
// }
//===============================================//
// int id;
// String name;
// //creating a parameterized constructor
// constructor(int i ,String n){
// id = i;
// name = n;
// }
// //method to display the values
// void display(){
// System.out.println(id+" "+name);
// }
//===============================================//
//Contructor Overloading
int id;
String name;
int classN;
//creating three arg constructor
constructor(int i , String n, int c) {
id=i ; name= n; classN = c;
}
void display(){
System.out.println(id+" "+name+" "+classN);
}
public static void main(String[] args) {
//calling a default constructor
//constructor constructor = new constructor();
//==================================//
// //creating objects and passing values
// constructor c1 = new constructor(101,"Yash");
// constructor c2 = new constructor(102,"Second Yash");
//
// //calling method to display the values of object
// c1.display();
// c2.display();
//==================================//
//Constructor Overloading
constructor c1 = new constructor(222,"Yash",3);
constructor c2 = new constructor(786,"Second Yash",4);
c1.display();
c2.display();
}
}
Function Overloading :
package com.company.yash;
public class functionOverloading {
// Overloaded sum(). This sum takes two int parameters
public int sum(int x, int y)
{
return (x + y);
}
// Overloaded sum(). This sum takes three int parameters
public int sum(int x, int y, int z)
{
return (x + y + z);
}
// Overloaded sum(). This sum takes two double parameters
public double sum(double x, double y)
{
return (x + y);
}
// Driver code
public static void main(String args[])
{
functionOverloading s = new functionOverloading();
System.out.println(s.sum(10, 20));
System.out.println(s.sum(10, 20, 30));
System.out.println(s.sum(10.5, 20.5));
}
}
