To parse the hexadecimal string to create BigInteger, use the following BigInteger constructor and set the radix as 16 for Hexadecimal.BigInteger(String val, int radix)This constructor is used to translate the String representation of a BigInteger in the specified radix into a BigInteger.In the below example, we have set the BigInteger and radix is set as 16 −Example Live Demoimport java.math.*; public class Demo {    public static void main(String[] args) {       BigInteger one, two;       String hexStr = "290f98";       one = new BigInteger("250");       // parsing       two = ... Read More

To parse the decimal string to create BigInteger, just set the decimal string in the BigInteger.Here is our BigInteger.BigInteger one; String decStr = "687879"; one = new BigInteger(decStr);Let us see another example −Example Live Demoimport java.math.*; public class Demo {    public static void main(String[] args) {       BigInteger one, two;       String decStr = "4373427";       one = new BigInteger("250");       two = new BigInteger(decStr);       System.out.println("Result (BigInteger) : " +one);       System.out.println("Result (Parsing Decimal String) : " +two);    } }OutputResult (BigInteger) : 250 Result (Parsing Decimal String) : 4373427

To parse the octal string to create BigInteger, use the following BigInteger constructor and set the radix as 8 for Octal −BigInteger(String val, int radix)This constructor is used to translate the String representation of a BigInteger in the specified radix into a BigInteger.In the below example, we have set the BigInteger and radix is set as 8.BigInteger one, two; one = new BigInteger("12"); two = new BigInteger("4373427", 8);The following is the complete example −Example Live Demoimport java.math.*; public class Demo {    public static void main(String[] args) {       BigInteger one, two;       one = new BigInteger("12"); ... Read More

Use the toByteArray() method to return a byte array containing the two's-complement representation of this BigInteger. The byte array will be in big-endian byte-order: the most significant byte is in the zeroth element.The following is an example to retrieve the current bits in a byte array in two’s-complement form.Example Live Demoimport java.math.*; public class Demo {    public static void main(String[] args) {       // BigInteger objects       BigInteger bi1, bi2;       byte b1[] = { 0x1, 0x00, 0x00 };       bi1 = new BigInteger(b1);       b1 = bi1.toByteArray();     ... Read More

The MM format is for months in two-digits 01, 02, 03, 04, etc. Here, we will use the following.SimpleDateFormat("MM");Let us see an example −// displaying month in MM format SimpleDateFormat simpleformat = new SimpleDateFormat("MM"); String strMonth = simpleformat.format(new Date()); System.out.println("Month in MM format = "+strMonth)Above, we have used the SimpleDateFormat class, therefore the following package is imported −import java.text.SimpleDateFormat;The following is an example −Example Live Demoimport java.text.Format; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Calendar; public class Demo {    public static void main(String[] args) throws Exception {       // displaying current date and time       Calendar cal = ... Read More

The following is an example −Example Live Demopublic class Demo {    public static void main(String[] args) {       String str = "laptop";       System.out.println("Original String = " +str);       // letter one       String strOne = str.substring(0,1).toUpperCase();       // remaining letters       String strTwo = str.substring(1).toLowerCase();       System.out.println("Resultant String = "+strOne + strTwo);    } }OutputOriginal String = laptop Resultant String = Laptop

The following is our string −String str = "Tim";Now take a StringBuilder object −StringBuilder strBuilder = new StringBuilder();Perform left padding and extend the string length. We have set it till 20, that would include the current string as well. The zeros that will be padded comes on the left. Append the zeros here −while (strBuilder.length() + str.length() < 10) { strBuilder.append('0'); }The following is an example −Example Live Demopublic class Demo {    public static void main(String[] args) {       String str = "Tim";       StringBuilder strBuilder = new StringBuilder();       while (strBuilder.length() + str.length() ... Read More

Let us see an example first to understand how an integer looks with left padding −888 //left padding with spaces 0000000999 //left padding with 7 zerosLet us see an example to left pad a number with zero −Example Live Demopublic class Demo {    public static void main(String[] args) {       int val = 9899;       System.out.println(String.format("%05d",val));    } }Output09899Let us see another example that pads a greater number of zeros −Example Live Demopublic class Demo {    public static void main(String[] args) {       int val = 9899;       System.out.println(String.format("%010d", val));    } }Output0000009899

Let us see an example first to understand how a string looks with left padding −demotext //left padding with spaces 0000000demotext //left padding with 7 zerosThe following is our string −String str = "Jack";Now take a StringBuilder object −StringBuilder strBuilder = new StringBuilder();Perform left padding and extend the string length. The spaces that will be padded comes on the left. Append the spaces here −while (strBuilder.length() + str.length() < 10) {    strBuilder.append(' '); }The following is an example to pad a string to the left with spacesExample Live Demopublic class Demo {    public static void main(String[] args) {   ... Read More

The following is our string −String str = "Amit";Now take a StringBuilder object −StringBuilder strBuilder = new StringBuilder();Set the character you want to pad with a string −Character ch = '^';Perform left padding and extend the string length to 5 (one for the additional character). The character that will be padded comes on the left −while (strBuilder.length() + str.length() < 5) { strBuilder.append(ch); }The following is an example −Example Live Demopublic class Demo {    public static void main(String[] args) {       String str = "Amit";       Character ch = '^';       StringBuilder strBuilder = ... Read More