Question

I need help displaying two zeroes in hours:minutes:seconds. In Java.

Time: 6:0:0 Time: 6:59:59 Time: 12:0:0 :

I need some help for the time to display correctly. I want it to display double zeroes. 06:00:00 and 12:00:00.

public class Clock {
String name;
static int uid=100;
int id;
int hr;
int min;
int sec;
public Clock() {
  this.name="Default";
  this.id=uid;
  this.hr=00;
this.min=00;
this.sec=00;
uid++;
}
public Clock(String name, int hr, int min, int sec) {
if (hr<=24 && min <=60 && sec <=60) {
  this.hr = hr;
this.min = min;
this.sec = sec;
}
else{
System.out.println("Please enter correct Time format");
return;
}
  this.name = name;
  this.id = uid;
uid++;

}
public String getName() {
return name;
}

public void setName(String name) {
  this.name = name;
}
public int getId() {
return this.id;
}
public void setId(int id) {
  this.id = id;
}
public int getHr() {
return hr;
}
public void setHr(int hr) {
  this.hr = hr;
}
public int getMin() {
return min;
}
public void setMin(int min) {
this.min = min;
}
public int getSec() {
return sec;
}
public void setSec(int sec) {
this.sec = sec;
}
public void printTime(){
System.out.println("Name: "+this.name+" ID: "+this.id+" Time:
"+this.hr+":"+this.min+":"+this.sec);

}
public static void main(String args[]){

Clock clock1 = new Clock("A",6,0,0);
clock1.printTime();
clock1.setHr(06);
clock1.setMin(59);
clock1.setSec(59);
clock1.printTime();

Clock clock2 = new Clock("My Alarm",12,00,00);
clock2.printTime();
}
}

Answer 1

Please find the working code snippet. Let me know if you face any issues during compilation. Thanks.

Following are the two corrections made:

1. Import java util formatter class.

2. Format the hour, min & sec using String.format().

Code Snippet:

import java.util.Formatter;

public class Clock {
String name;
static int uid=100;
int id;
int hr;
int min;
int sec;
public Clock() {
  this.name="Default";
  this.id=uid;
  this.hr=00;
this.min=00;
this.sec=00;
uid++;
}
public Clock(String name, int hr, int min, int sec) {
if (hr<=24 && min <=60 && sec <=60) {
  this.hr = hr;
this.min = min;
this.sec = sec;
}
else{
System.out.println("Please enter correct Time format");
return;
}
  this.name = name;
  this.id = uid;
uid++;


}
public String getName() {
return name;
}

public void setName(String name) {
  this.name = name;
}
public int getId() {
return this.id;
}
public void setId(int id) {
  this.id = id;
}
public int getHr() {
return hr;
}
public void setHr(int hr) {
  this.hr = hr;
}
public int getMin() {
return min;
}
public void setMin(int min) {
this.min = min;
}
public int getSec() {
return sec;
}
public void setSec(int sec) {
this.sec = sec;
}
public void printTime(){
System.out.println("Name: "+this.name+" ID: "+this.id+" Time:"+ String.format("%02d", this.hr)+":"+String.format("%02d", this.min)+":"+String.format("%02d", this.sec));
}

public static void main(String args[]){


Clock clock1 = new Clock("A",6,0,0);
clock1.printTime();
clock1.setHr(06);
clock1.setMin(59);
clock1.setSec(59);
clock1.printTime();


Clock clock2 = new Clock("My Alarm",12,00,00);
clock2.printTime();
}

}

Screenshot of the Output:

D:\>cd D:\javaljdk-14.0.2\bin D:\javaljdk-14.0.2\bin>javac D:\javaprograms\clock.java D:\javaljdk-14.0.2\bin>java D:\javaprograms\Clock.java Name: A ID: 100 Time: 06:00:00 Name: A ID: 100 Time: 06:59:59 Name: My Alarm ID: 101 Time: 12:00:00 D:\java\jdk-14.0.2\bin>