Created
October 18, 2018 14:00
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Resolver for Engineer Puzzle 6 (http://tango-ruby.hatenablog.com/entry/2016/02/14/222943)
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package com.company; | |
import java.text.DateFormat; | |
import java.text.SimpleDateFormat; | |
import java.util.ArrayList; | |
import java.util.Date; | |
import java.util.List; | |
import java.util.logging.*; | |
/** | |
* Resolve http://tango-ruby.hatenablog.com/entry/2016/02/14/222943 | |
*/ | |
public class Resolver { | |
static final Logger logger = Logger.getLogger(Resolver.class.getName()); | |
public static void main(String[] args) { | |
setupLogger(); | |
logger.info("Hello"); | |
final Integer numberOfCandies = 2110154; | |
final List<Boolean> ateCandies = new ArrayList<>(); | |
for (Integer i = 0; i < numberOfCandies; i++) { | |
ateCandies.add(false); | |
} | |
final Integer stepCounts = 166; | |
Integer i = 0; | |
while (!ateCandies.get(i)) { | |
ateCandies.set(i, true); | |
i = (i + stepCounts) % numberOfCandies; | |
} | |
logger.info("Count: " + ateCandies.stream().filter(ate -> ate).count()); | |
} | |
private static void setupLogger() { | |
ConsoleHandler consoleHandler = new ConsoleHandler(); | |
consoleHandler.setLevel(Level.INFO); | |
consoleHandler.setFormatter(new MyFormatter()); | |
logger.addHandler(consoleHandler); | |
logger.setUseParentHandlers(false); | |
} | |
} | |
class MyFormatter extends Formatter { | |
// Create a DateFormat to format the logger timestamp. | |
private static final DateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.SSS"); | |
public String format(LogRecord record) { | |
StringBuilder builder = new StringBuilder(1000); | |
builder.append(df.format(new Date(record.getMillis()))); | |
builder.append(" ").append(record.getLevel()).append(" "); | |
builder.append("[").append(record.getSourceClassName()).append("."); | |
builder.append(record.getSourceMethodName()).append("] "); | |
builder.append(formatMessage(record)); | |
builder.append("\n"); | |
return builder.toString(); | |
} | |
public String getHead(Handler h) { | |
return super.getHead(h); | |
} | |
public String getTail(Handler h) { | |
return super.getTail(h); | |
} | |
} |
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