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Articles on Trending Technologies
Technical articles with clear explanations and examples
Perform Bubble Sort on strings in Java
To perform Bubble Sort, try the below given code. In this each each pair of adjacent elements is compared and the elements are swapped if they are not in order.The following is an example.Examplepublic class Demo { public static void main(String []args) { String str[] = { "s", "k", "r", "v", "n"}; String temp; System.out.println("Sorted string..."); for (int j = 0; j < str.length; j++) { for (int i = j + 1; i < str.length; i++) { ...
Read MoreLeft pad an integer in Java with zeros
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 −Examplepublic 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 −Examplepublic class Demo { public static void main(String[] args) { int val = 9899; System.out.println(String.format("%010d", val)); } }Output0000009899
Read MoreDisplay minutes with SimpleDateFormat('mm') in Java
To work with SimpleDateFormat class in Java, import the following package.import java.text.SimpleDateFormat;Now, set the format with SimpleDateFormat(“mm”) to display minutes in two-digits.Format f = new SimpleDateFormat(‘”mm”);Now, get the minutes in a string.String strMinute = f.format(new Date());The following is an example −Exampleimport 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 = Calendar.getInstance(); SimpleDateFormat simpleformat = new SimpleDateFormat("dd/MMMM/yyyy hh:mm:s"); ...
Read MoreFormat Calendar with String.format() in Java
Firstly, consider an object with date value.Object arrObj[] = { "Date", Calendar.getInstance() };After that, use the String.format() method to format Calendar and display the date.The following is an example.Exampleimport java.util.Calendar; public class Demo { public static void main(String []args){ Object arrObj[] = { "Date", Calendar.getInstance() }; System.out.println("Formatting Date..."); System.out.println(String.format("%1$s = %2$tY %2$tm %2$te", arrObj)); } }OutputFormatting Date... Date = 2018 11 17
Read MoreDisplay complete date and time information using Formatter in Java
Firstly, create a Formatter and Calendar object.Formatter f = new Formatter(); Calendar cal = Calendar.getInstance();Now display the current date and time. We have shown the date here in both lowercase and uppercase −f = new Formatter(); System.out.println(f.format("Date and Time (lowercase): %tc", cal)); f = new Formatter(); System.out.println(f.format("Date and Time (uppercase): %Tc", cal));The following is an example −Exampleimport java.util.Calendar; import java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); Calendar cal = Calendar.getInstance(); ...
Read MoreDisplay the day in week using SimpleDateFormat('E') in Java
To display the day in week, use the SimpleDateFormat(“E”) as shown below −Format f = new SimpleDateFormat("E"); String strDayinWeek = f.format(new Date()); System.out.println("Day in week = "+strDayinWeek);Since, we have used the Format and SimpleDateFormat class above, therefore import the following packages. With that, we have also used the Date.import java.text.Format; import java.text.SimpleDateFormat; import java.util.Date;Exampleimport 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 = Calendar.getInstance(); SimpleDateFormat simpleformat = new SimpleDateFormat("dd/MMMM/yyyy hh:mm:s"); ...
Read MoreMake the first letter caps and the rest lowercase in Java
The following is an example −Examplepublic 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
Read MoreWhat is the difference between new/delete and malloc/ free in C/ C++?
new/ deleteThe new operator requests for the memory allocation in heap. If the sufficient memory is available, it initializes the memory to the pointer variable and returns its address.The delete operator is used to deallocate the memory. User has the privilege to deallocate the created pointer variable by this delete operator.Here is an example of new/delete operator in C++ language,Example#include using namespace std; int main () { int *ptr1 = NULL; ptr1 = new int; float *ptr2 = new float(299.121); int *ptr3 = new int[28]; *ptr1 = 28; cout
Read MoreJava Program to get full day name
To display the full day name, use the SimpleDateFormat(“EEEE”) as shown below −// displaying full-day name f = new SimpleDateFormat("EEEE"); String str = f.format(new Date()); System.out.println("Full Day Name = "+str);Since, we have used the Format and SimpleDateFormat class above, therefore import the following packages. With that, we have also used the Date.import java.text.Format; import java.text.SimpleDateFormat; import java.util.Date;Exampleimport 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 = Calendar.getInstance(); SimpleDateFormat simpleformat = new ...
Read MoreJava Program to display date and time information in lowercase
Firstly, create a Formatter and a Calendar object.Formatter f = new Formatter(); Calendar c = Calendar.getInstance();To display complete date and time information use the ‘c’ conversion character. However, to display it in lowercase, use ‘tc’ −f = new Formatter(); System.out.println(f.format("Date and Time (lowercase): %tc", cal));The following is an example −Exampleimport java.util.Calendar; import java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); Calendar cal = Calendar.getInstance(); System.out.println("Current date and time: "+cal.getTime()); ...
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