Collections and Important Libraries
Agenda
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Product Design
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Development
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UI/UX Testing
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Branding
The Java Math module provides the users with various methods relating to maths.
Math module
Comparisons
class Main {
public static void main(String[] args) {
int a = Math.max(3, 5);
int b = Math.min(3, 5);
System.out.println(a); // 5
System.out.println(b); // 3
}
}Rounding off
class Main {
public static void main(String[] args) {
double x = Math.floor(3.2);
double y = Math.ceil(3.2);
double z = Math.round(3.2);
double a = Math.round(3.8);
System.out.println(x); // 3.0
System.out.println(y); // 4.0
System.out.println(z); // 3.0
System.out.println(a); // 4.0
}
}Logarithms and Exponents
class Main {
public static void main(String[] args) {
double E = Math.E;
System.out.println(E); // 2.718281828459045
double x = Math.log(E);
double y = Math.log10(100);
System.out.println(x); // 1.0
System.out.println(y); // 2.0
double a = Math.pow(2, 3);
System.out.println(a); // 8.0
double b = Math.sqrt(25);
System.out.println(b); // 5.0
}
}Trigonometry
class Main {
public static void main(String[] args) {
final double PI = Math.PI;
System.out.println(PI);
System.out.println(Math.sin(PI / 6));
System.out.println(Math.sin(0));
System.out.println(Math.cos(PI / 3));
System.out.println(Math.cos(0));
}
}The BigInteger class is used to store and work with large integer values.
BigInteger
class Main {
public static void main(String[] args) {
BigInteger a = new BigInteger("200000000000000000000000000");
BigInteger b = new BigInteger("300000000000000000000000000");
BigInteger c = a.add(b);
System.out.println(c); // 500000000000000000000000000
}
}Compute Factorial
Given an integer N, compute its factorial.
Sample Input
N = 5
Sample Output
120
Collections & Utility Libraries
By Tarun Luthra
