Question by Mouse1_19: What I’m missing in this Java program?
/* java1.6\bin\java MinerDemo (for Windows)
java MinerDemo (for Mac OS X)
to run Java interpreter on the MinerDemo.class file provided—can’t do jcr as usual because it kills all .class files first thing)*/

import java.util.Scanner;
import java.util.ArrayList;

public class Miner
{
private static int LASTID = 0;
private static double STARTPAY = 8.50;

private String name;
private int id;
private long timeEntered;
private double secondsWorked;
private double payRate;
private double totalPay;

public Miner( String nameIn )
{
name = nameIn;
LASTID++;
id = LASTID;
timeEntered = 0;
secondsWorked = 0;
payRate = STARTPAY;
totalPay = 0;
}

public void enterMine()
{
timeEntered = System.nanoTime(); // note time entered which is always > 0
}

public void leaveMine()
{
double time = Math.round((System.nanoTime() – timeEntered)/1000000000.);
secondsWorked += time;
timeEntered = 0; // mark miner as not in mine
}

public String toString()
{
String status;
if( isInMine() )
status = ” in”;
else
status = “out”;

return “Name: ” + format(name,8) + ” ID: ” + format(id,2) +
” status: ” + status + ” Pay rate:” +
format(payRate,6) + ” unpaid seconds: ” +
format(secondsWorked,6) + ” total pay: ” + format(totalPay,6);
}

private static String format( String s, int columns )
{
String r = s;
int m = columns – s.length();
if( m < 0 )
m = 0;
for( int k=1; k<=m; k++ )
r = " " + r;
return r;
}

private static String format( double x, int columns )
{
return format( "" + x, columns );
}

private static String format( int x, int columns )
{
return format( "" + x, columns );
}

public static void main(String[] args)
{
// simulate operation of the mine:

ArrayList list = new ArrayList();

help();

Scanner keys = new Scanner( System.in );
String choice;
int k, j;
double r;
Miner miner;

// repeatedly get and process user request:

do{

// display all the miner info:
System.out.println(“———————–”);
for( k=0; k System.out.println( list.get(k).toString() );
System.out.println(" ");

choice = keys.nextLine();

if( choice.equals( "a" ) )
{// add a miner
System.out.print("Enter name of new miner: ");
choice = keys.nextLine();
list.add( new Miner( choice ) );
}
else if( choice.equals( "p" ) )
{// pay all miners
for( k=0; k list.get(k).figurePay();
}
else if( choice.equals( "r" ) )
{// give a raise to one miner
System.out.print("Enter id of miner to receive raise: ");
j = keys.nextInt(); keys.nextLine();
miner = findMinerById( list, j );
if( miner != null )
{
System.out.print("Enter amount of raise: ");
r = keys.nextDouble(); keys.nextLine();
miner.receiveRaise( r );
}
}
else if( choice.equals( "q" ) )
{// quit the simulation
System.out.println("Exiting simulation");
System.exit(0);
}
else
{// move miner with this id in/out of mine
try{
j = Integer.parseInt( choice );
miner = findMinerById( list, j );
if( miner != null )
{// legal id, change in/out status
if( miner.isInMine() )
miner.leaveMine();
else
miner.enterMine();
}
else
System.out.println( j + " is not a valid id");
}
catch(Exception e)
{
System.out.println("Entry is not a legal integer value");
}
}

}while( true );

}

private static Miner findMinerById( ArrayList list, int targetId )
{
for( int k=0; k if( list.get(k).getId() == targetId )
return list.get(k);
return null; // never found the target id
}

private static void help()
{
System.out.println("Welcome to the Mine Simulation");
System.out.println("(enter");
System.out.println(" id # to move that miner in/out of mine");
System.out.println(" a to add a miner");
System.out.println(" p to pay all the miners");
System.out.println(" r to giv

Best answer:

Answer by Ratchetr
The first thing you are missing is the rest of your code. Yahoo ate it. And they butchered much of the rest of it as well.
When you have this much code, you should use a site like pastebin.com. Post the code there, then post a link to it here.

The second thing you are missing is…we need a hint. What do you think is missing? What is the problem you are trying to solve?
Does the code not compile? If not, which lines generate errors, and what are the errors?
Does the code compile but fail to run at all? If so…what are the errors?
Or does the code run, but not do what you expect it to do? If so…what does it do, and what do you expect it to do?
With that much code, you need to help us know what to focus on.

Give your answer to this question below!