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‎DigitalClock.java

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/*
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Author
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Himanshu Sharma
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himanshusharma2972@gmail.com
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www.blaregroup.com
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===============================================================
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Digital clock on terminal
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===============================================================
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About
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This is a simple java program for practice purpose
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This program shows you Digital Clock on terminal
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*/
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import java.time.LocalDateTime; //importing module for time
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class DigitalClock
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{
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//method to create digit pattern
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void repeat(int top,int bottom,int middle,int upperleft,int lowerleft,int upperright,int lowerright,int height,int i)
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{
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if(i%2==0 && i!=0)
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{ if(height==4 || height==6)
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{
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System.out.print(" : ");
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}
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else
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{
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System.out.print(" ");
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}
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}
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else
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{
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System.out.print(" ");
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}
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if((height==1 || height==2 || height==3 || height==4 || height==5) && upperleft==1)
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{
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System.out.print("*");
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}
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else if((height==1 || height==2 || height==3 || height==4 || height==5 ) && upperleft==0)
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{
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System.out.print(" ");
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}
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if((height==6 || height==7 || height==8 || height==9 || height==10) && lowerleft==1)
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{
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System.out.print("*");
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}
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else if((height==6 || height==7 || height==8 || height==9 || height==10 ) && lowerleft==0)
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{
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System.out.print(" ");
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}
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for(int width=1;width<=5;width++)
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{
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if(height==1 && top==1)
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{
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System.out.print("*");
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}
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else if(height==5 && middle==1)
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{
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System.out.print("*");
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}
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else if(height==10 && bottom==1)
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{
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System.out.print("*");
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}
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else
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{
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System.out.print(" ");
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}
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}
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if((height==1 || height==2 || height==3 || height==4 || height==5) && upperright==1)
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{
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System.out.print("*");
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}
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else if((height==1 || height==2 || height==3 || height==4 || height==5) && upperright==0)
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{
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System.out.print(" ");
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}
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if((height==6 || height==7 || height==8 || height==9 || height==10 ) && lowerright==1)
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{
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System.out.print("*");
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}
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else if((height==6 || height==7 || height==8 || height==9 || height==10) && lowerright==0)
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{
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System.out.print(" ");
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}
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}
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public static void main(String args[])
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{
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DigitalClock obj = new DigitalClock();
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// useful variables to design pattern
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int top = 1;
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int lowerleft = 1;
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int upperleft = 1;
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int upperright = 1;
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int lowerright = 1;
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int bottom = 1;
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int middle = 1;
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int loop=0;
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//useful variable for taking time from system and store it in a string
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int hour,minute,second;
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String hourzero ="";
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String minutezero = "";
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String secondzero = "";
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String time="";
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LocalDateTime now; //class object
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//main process
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while(loop!=1)
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{
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try{
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Thread.sleep(70); //for holding screen
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System.out.print("\033[H\033[2J"); //for clearing screen
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System.out.flush();
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}
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catch(Exception e)
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{
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}
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now= LocalDateTime.now(); //for taking time from system
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hour = now.getHour(); //for separating hours from time
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minute = now.getMinute(); //for separating minutes from time
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second = now.getSecond(); //for separating seconds from time
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//adjusting number of zero in time
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if(hour<10){
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hourzero="0";
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}
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else{
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hourzero="";
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}
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if(minute<9){
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minutezero="0";
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}
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else{
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minutezero="";
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}
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if(second<9){
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secondzero="0";
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}
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else{
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secondzero="";
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}
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//storing time in string for manupulation
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time =String.format(("%s"+Integer.toString(hour) + "%s"+Integer.toString(minute) + "%s"+Integer.toString(second)),hourzero,minutezero,secondzero);
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//creation of pattern
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for(int height=1;height<=10;height++)
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{ System.out.println();
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for(int i=0;i<time.length();i++)
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{
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switch(time.charAt(i))
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{
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case '0':top=1;middle=0;bottom=1;upperleft=1;lowerleft=1;upperright=1;lowerright=1;break;
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case '1':top=0;middle=0;bottom=0;upperleft=0;lowerleft=0;upperright=1;lowerright=1;break;
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case '2':top=1;middle=1;bottom=1;upperleft=0;lowerleft=1;upperright=1;lowerright=0;break;
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case '3':top=1;middle=1;bottom=1;upperleft=0;lowerleft=0;upperright=1;lowerright=1;break;
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case '4':top=0;middle=1;bottom=0;upperleft=1;lowerleft=0;upperright=1;lowerright=1;break;
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case '5':top=1;middle=1;bottom=1;upperleft=1;lowerleft=0;upperright=0;lowerright=1;break;
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case '6':top=1;middle=1;bottom=1;upperleft=1;lowerleft=1;upperright=0;lowerright=1;break;
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case '7':top=1;middle=0;bottom=0;upperleft=0;lowerleft=0;upperright=1;lowerright=1;break;
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case '8':top=1;middle=1;bottom=1;upperleft=1;lowerleft=1;upperright=1;lowerright=1;break;
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case '9':top=1;middle=1;bottom=1;upperleft=1;lowerleft=0;upperright=1;lowerright=1;break;
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}
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obj.repeat(top,bottom,middle,upperleft,lowerleft,upperright,lowerright,height,i);
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}
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}
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}
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System.out.println("");
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}
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}

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