How do you sort by age and name in Java?

How do you sort by age and name in Java?

The logic should go like this:

  1. Compare names using t. getFname(). compareTo(t1. getFname())
  2. If names are not the same, return the result of comparison.
  3. Otherwise, return the result of comparing ages.

How do you calculate someone’s age in Java?

Finding the age

  1. Get the date of birth from the user.
  2. Convert it to LocalDate object.
  3. Get the current date (as LocalDate object)
  4. Find the period between these two dates using the between() method as −

How do I sort Two fields in Java 8?

To sort on multiple fields, we must first create comparator for each field on which we want to sort the stream. Then chain each comparator in desired order to give group by effect on complete sorting.

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How do you sort your age?

Under the Column heading, select the Then by down arrow and choose Age to sort records with duplicate names by the Age column. Under the Order heading, choose Largest to Smallest from the drop-down list to sort the Age data in descending order. Select OK to close the dialog box and sort the data.

What is comparable and comparator interface?

Comparable and comparator both are an interface that can be used to sort the elements of the collection. Comparator interface sort collection using two objects provided to it, whereas comparable interface compares” this” refers to the one objects provided to it.

How do I compare two date objects in Java?

In Java, two dates can be compared using the compareTo() method of Comparable interface. This method returns ‘0’ if both the dates are equal, it returns a value “greater than 0” if date1 is after date2 and it returns a value “less than 0” if date1 is before date2.

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How do you enter age in programming?

To input something means to put it into the computer. Output is the reverse, like the print statements we’ve been using. So our program now looks something like this: print “What is your age?” age = input() if age == 1: print “You are ” + age + ” year old.” else: print “You are ” + age + ” years old.”

How do I put first name and last name in java?

Scanner name = new Scanner (; String firstname; String secondname; System. out. println(“Enter your first name:”); firstname = name. next(); System.

How do you write a comparator in Java 8?

Java 8 Comparator Example

  1. class Student {
  2. int rollno;
  3. String name;
  4. int age;
  5. Student(int rollno,String name,int age){
  6. this.rollno=rollno;
  8. this.age=age;

What is comparator and comparable?