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Java basics

default


The default keyword is used to label the default branch in a switch statement. A default block does not have an implicit ending point. A break statement is typically used at the end of each case or default block to exit the switch statement upon completion of the block. Without a default statement, a switch statement whose argument matches no case blocks will do nothing.

Syntax:
switch(ch){
case 1: statement;
             break;
default: statement;
}


Example:

import java.time.*;
import java.lang.*;
import java.util.*;

public class SimpleTimeClient implements TimeClient {
    
    private LocalDateTime dateAndTime;
    
    public SimpleTimeClient() {
        dateAndTime = LocalDateTime.now();
    }
    
    public void setTime(int hour, int minute, int second) {
        LocalDate currentDate = LocalDate.from(dateAndTime);
        LocalTime timeToSet = LocalTime.of(hour, minute, second);
        dateAndTime = LocalDateTime.of(currentDate, timeToSet);
    }
    
    public void setDate(int day, int month, int year) {
        LocalDate dateToSet = LocalDate.of(day, month, year);
        LocalTime currentTime = LocalTime.from(dateAndTime);
        dateAndTime = LocalDateTime.of(dateToSet, currentTime);
    }
    
    public void setDateAndTime(int day, int month, int year,
                               int hour, int minute, int second) {
        LocalDate dateToSet = LocalDate.of(day, month, year);
        LocalTime timeToSet = LocalTime.of(hour, minute, second); 
        dateAndTime = LocalDateTime.of(dateToSet, timeToSet);
    }
    
    public LocalDateTime getLocalDateTime() {
        return dateAndTime;
    }
    
    public String toString() {
        return dateAndTime.toString();
    }
    
    public static void main(String... args) {
        TimeClient myTimeClient = new SimpleTimeClient();
        System.out.println(myTimeClient.toString());
    }
}


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