paulaner80

Math.ceil(double); //올림Math.floor(double); //버림Math.round(double); Math.round(flaot); //반올림 double d = 100d/8d; System.out.println( d );System.out.println(Math.ceil( d ));System.out.println(Math.floor( d ));System.out.println(Math.round( d )); --결과--12.513.012.013

1. Date와 String간 형변환 String to Date String date = "2014-10-04 13:00:30";SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date string = sdf.parse(date); Date to String Date date = new Date();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String string = sdf.format(date);

protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_screen_on);mTxtView = (TextView) findViewById(R.id.textView1);mNM = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);PendingIntent mPendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, new Intent(getApplicationContext(),ScreenOnActivity.clas..