The java.lang.Math.sqrt(double a) returns the correctly rounded positive square root of a double value. Special cases −If the argument is NaN or less than zero, then the result is NaN.If the argument is positive infinity, then the result is positive infinity.If the argument is positive zero or negative zero, then the result is the same as the argument.Following is an example to implement the sqrt() method of the Math class in Java −Exampleimport java.lang.*; public class Demo {    public static void main(String[] args) {       // get two double numbers numbers       double x = 9;   ... Read More

The java.util.HashMap class is the Hash table based implementation of the Map interface. To clone a Map in Java, use the clone() method.ExampleLet us see an example to clone a Map −import java.util.*; public class HashMapDemo {    public static void main(String args[]) {       // create two hash maps       HashMap newmap1 = new HashMap();       HashMap newmap2 = new HashMap();       // populate 1st map       newmap1.put(1, "This");       newmap1.put(2, "is");       newmap1.put(3, "it!");       // clone 1st map       newmap2 = ... Read More

To clone a list in Java, the easiest way is using the ArrayList.clone() method −Exampleimport java.util.ArrayList; public class Demo {    public static void main(String args[]) {       // create an empty array list       ArrayList arrlist1 = new ArrayList();       // use add for new value       arrlist1.add(new StringBuilder("Learning-"));       // using clone to affect the objects pointed to by the references.       ArrayList arrlist2 = (ArrayList) arrlist1.clone();       // appending the string       StringBuilder strbuilder = arrlist1.get(0);       strbuilder.append("list1, list2-both ... Read More

The Ints class is a utility class for primitive type int. Let us see the class declaration −@GwtCompatible public final class Ints extends ObjectExampleLet us see an example of one of the methods to perform concatenation. The concat() function in Ints class is used to concatenate the arrays passed as parameter −import com.google.common.primitives.Ints; import java.util.*; class Demo {    public static void main(String[] args) {       int[] myArr1 = { 100, 150, 230, 300, 400 };       int[] myArr2 = { 450, 550, 700, 800, 1000 };       System.out.println("Array 1 = ");     ... Read More

The java.lang.Math.cbrt(double a) returns the cube root of a double value. For positive finite x, cbrt(-x) == -cbrt(x); that is, the cube root of a negative value is the negative of the cube root of that value's magnitude. Special cases −If the argument is NaN, then the result is NaN.If the argument is infinite, then the result is an infinity with the same sign as the argument.If the argument is zero, then the result is a zero with the same sign as the argument.ExampleFollowing is an example to implement the cbrt() method in Java −import java.lang.*; public class Example {    public ... Read More

The java.lang.Math.log1p(double x) returns the natural logarithm of the sum of the argument and 1. Note that for small values x, the result of log1p(x) is much closer to the true result of ln(1 + x) than the floating-point evaluation of log(1.0+x).Special cases −If the argument is NaN or less than -1, then the result is NaN.If the argument is positive infinity, then the result is positive infinity.If the argument is negative one, then the result is negative infinity.If the argument is zero, then the result is a zero with the same sign as the argument.ExampleFollowing is an example to implement the ... Read More

The java.lang.Math.log10(double a) returns the base 10 logarithm of a double value. Special cases −If the argument is NaN or less than zero, then the result is NaN.If the argument is positive infinity, then the result is positive infinity.If the argument is positive zero or negative zero, then the result is negative infinity.If the argument is equal to 10n for integer n, then the result is n.ExampleFollowing is an example to implement the log10() method in Java −import java.lang.*; public class MathDemo {    public static void main(String[] args) {       double x = 56567.5;       double y ... Read More

The java.lang.Long.toBinaryString() method returns a string representation of the long argument as an unsigned integer in base 2.ExampleFollowing is an example to implement the toBinaryString() method −import java.lang.*; public class Demo {    public static void main(String[] args) {       long l = 190;       System.out.println("Number = " + l);       /* returns the string representation of the unsigned long value       represented by the argument in binary (base 2) */       System.out.println("Binary is " + Long.toBinaryString(l));       // returns the number of one-bits       System.out.println("Number ... Read More

The java.lang.Integer.toBinaryString() method returns a string representation of the integer argument as an unsigned integer in base 2.ExampleFollowing is an example to implement the toBinaryString() method in Java −import java.lang.*; public class IntegerDemo {    public static void main(String[] args) {       int i = 170;       System.out.println("Number = " + i);       /* returns the string representation of the unsigned integer value       represented by the argument in binary (base 2) */       System.out.println("Binary is " + Integer.toBinaryString(i));       // returns the number of one-bits       System.out.println("Num ... Read More

In this article, we will learn how to use the java.lang.Long.toOctalString() method in Java. The java.lang.Long.toOctalString() method returns a string representation of the long argument as an unsigned integer in base 8. Java.lang.Long.toOctalString() methodThe java.lang.Long.toOctalString() method converts a given long value into its octal (base-8) string representation. It returns a string that represents the numerical value in octal format. This method is useful when you need to display or work with numbers in octal form. Steps to convert a long to an octal stringThe following are the steps to convert a long to an octal ... Read More