Firstly, we have considered the following two dates.SimpleDateFormat s = new SimpleDateFormat("yyyy-MM-dd"); Date d1 = s.parse("2018-10-15"); Date d2 = s.parse("2018-11-10");Now, use the compareTo() method to compare both the dates. The results are displayed on the basis of the return value.if (d1.compareTo(d2) > 0) {    System.out.println("Date1 is after Date2!");    } else if (d1.compareTo(d2) < 0) {       System.out.println("Date1 is before Date2!");    } else if (d1.compareTo(d2) == 0) {       System.out.println("Date1 is equal to Date2!");    } else {       System.out.println("How to get here?"); }Example Live Demoimport java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class ... Read More

Let’s say we have the following zip code.String zipStr = "12345";Now, set the following regular expression to match zip codes in America.String reg = "^[0-9]{5}(?:-[0-9]{4})?$";Example Live Demopublic class Demo {    public static void main(String[] args) {       String zipStr = "12345";       // regular expression       String reg = "^[0-9]{5}(?:-[0-9]{4})?$";       boolean res = zipStr.matches(reg);       System.out.println("Is it a valid zip code in US? "+res);    } }OutputIs it a valid zip code in US? True

Firstly, let us consider a string with quotesString originalStr = "\"Demo Text\"";Now, consider the following logic for the beginning quote.if (originalStr.startsWith("\"")) {    originalStr = originalStr.substring(1, originalStr.length()); }Now, consider the following logic for the ending quote.if (originalStr.endsWith("\"")) {    originalStr = originalStr.substring(0, originalStr.length() - 1); }Example Live Demopublic class Demo {    public static void main(String[] args) {       String originalStr = "\"Demo Text\"";       System.out.println("String with double quotes= "+originalStr);       if (originalStr.startsWith("\"")) {          originalStr = originalStr.substring(1, originalStr.length());       }       if (originalStr.endsWith("\"")) {       ... Read More

To shift left in a BigInteger, use the shiftLeft() method.The java.math.BigInteger.shiftLeft(int n) returns a BigInteger whose value is (this

To shift bits in a BigInteger, use the shiftLeft() or shiftRight() method.shiftLeft() methodThe java.math.BigInteger.shiftLeft(int n) returns a BigInteger whose value is (this > n). Sign extension is performed. The shift distance, n, may be negative, in which case this method performs a left shift. It computes floor(this / 2n).Example Live Demoimport java.math.*; public class Demo {    public static void main(String[] args) {       BigInteger one;       one = new BigInteger("25");       one = one.shiftRight(3);       System.out.println("Result: " +one);    } }OutputResult: 3

To flip a bit in a BigInteger in Java, use the flipBit() method. This method returns a BigInteger whose value is equivalent to this BigInteger with the designated bit flipped.Example Live Demoimport java.math.*; public class Demo {    public static void main(String[] args) {       BigInteger one, two;       one = new BigInteger("7");       one = one.flipBit(3);       System.out.println("Result: " +one);    } }OutputResult: 15Let us see another example.Example Live Demoimport java.math.*; public class Demo {    public static void main(String[] args) {       BigInteger bi1, bi2;       bi1 = ... Read More

To clear a bit in a BigInteger in Java, use the clearBit() method. It returns a BigInteger whose value is equivalent to this BigInteger with the designated bit cleared.Example Live Demoimport java.math.*; public class BigIntegerDemo {    public static void main(String[] args) {       BigInteger one, two;       one = new BigInteger("7");       two = one.clearBit(2);       System.out.println("Result: " +two);    } }OutputResult: 3Let us see another example.Example Live Demoimport java.math.*; public class Demo {    public static void main(String[] args) {       BigInteger bi1, bi2;       bi1 = new ... Read More

The setBit() method is used in Java to return a BigInteger whose value is equivalent to this BigInteger with the designated bit set.Example Live Demoimport java.math.*; public class BigIntegerDemo {    public static void main(String[] args) {       BigInteger one, two;       one = new BigInteger("7");       two = one.setBit(3);       System.out.println("Result: " +two);    } }OutputResult: 15Let us see another example.Example Live Demoimport java.math.*; public class Demo {    public static void main(String[] args) {       BigInteger bi1, bi2;       bi1 = new BigInteger("9");       // setbit ... Read More

A ternary operator uses 3 operands and it can be used to replace the if else statement. This can be done to make the code simpler and more compact.The syntax of the ternary operator is given as follows −Expression ? Statement 1 : Statement 2In the above syntax, the expression is a conditional expression that results in true or false. If the value of the expression is true, then statement 1 is executed otherwise statement 2 is executed.A program that demonstrates the ternary operator in Java is given as follows.Example Live Demopublic class Example {    public static void main(String[] args) ... Read More

A diamond shape can be printed by printing a triangle and then an inverted triangle. An example of this is given as follows −* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *A program that demonstrates this is given as follows.Example Live Demopublic class Example {    public static void main(String[] args) {       int n = 6;       int s = n - 1; ... Read More