age in java

ByAnurag batra October 4, 2022September 6, 2022

LocalDate today = LocalDate.now();
LocalDate birthday = LocalDate.of(1987, 09, 24);

Period period = Period.between(birthday, today);

//Now access the values as below
System.out.println(period.getDays());
System.out.println(period.getMonths());
System.out.println(period.getYears());

Here is what the above code is Doing:
1. We are creating two LocalDate objects, one for today and one for the birthday.
2. We are using the between() method of the Period class to get the difference between the two dates.
3. We are using the getDays(), getMonths() and getYears() methods to get the difference in days, months and years.

Java Examples

ChangeElementsOfHashMap

ByAnurag batra September 17, 2022September 6, 2022

// Java program to change // elements of HashMap import java.io.*; import java.util.*; class ChangeElementsOfHashMap { public static void main(String args[]) { // Initialization of a HashMap HashMap hm = new HashMap(); // Change Value using put method hm.put(1, “Geeks”); hm.put(2, “Geeks”); hm.put(3, “Geeks”); System.out.println(“Initial Map ” + hm); hm.put(2,…

java.lang.NoSuchMethodError: org.apache.logging.log4j.spi.LoggerContextFactory.isClassLoaderDependent()Z after log4j update

Java Examples

java.lang.NoSuchMethodError: org.apache.logging.log4j.spi.LoggerContextFactory.isClassLoaderDependent()Z after log4j update

ByAnurag batra October 5, 2022September 6, 2022

Most Probably you have missed adding the dependency for log4j-api Here is what the above code is Doing: 1. Create a logger for the class. 2. Create a FileHandler that will write to the file you specify. 3. Create a SimpleFormatter that will format the log messages in a certain way. 4. Add the FileHandler…

Java Examples

array java

ByAnurag batra October 5, 2022September 6, 2022

int[] theNumbers = new int[5]; arr[0] = 4; arr[1] = 8; arr[2] = 15; arr[3] = 16; arr[4] = 23; arr[5] = 42; Here is what the above code is Doing: 1. We create an array of ints called arr. 2. We create an array of ints called theNumbers. 3. We assign the value 4…

Java Examples

comparable interface java

ByAnurag batra October 10, 2022September 6, 2022

public class BinarySearchTree< T extends Comparable> { Node root; class Node { T data; Node left; Node right; public Node(T data) { this.data = data; } } public boolean isEmpty() { return root == null; } public void insert(T value) { if(isEmpty()) root = new Node(value); else insert(root, value); } private void insert(Node node, T…

Java Examples

java convert float to double

ByAnurag batra October 4, 2022September 6, 2022

float myFloat = x; //your float double d = (double)myFloat; Here is what the above code is Doing: 1. We create a float variable called myFloat and assign it the value of x. 2. We create a double variable called d and assign it the value of myFloat. 3. We cast myFloat to a double.

Java Examples

code to close dialog containg layout

ByAnurag batra September 16, 2022September 6, 2022

AlertDialog.Builder builder = new AlertDialog.Builder(this); LayoutInflater inflater = getLayoutInflater(); View dialogView = inflater.inflate(R.layout.brush_opts_dialog,null); builder.setView(dialogView); closeBtn = (Button)dialogView.findViewById(R.id.close_btn); final AlertDialog dialog = builder.create(); closeBtn .setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { dialog.dismiss(); } }); dialog.show(); Here is what the above code is Doing: 1. We create an AlertDialog.Builder object and pass the current context…

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