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java面试题及答案 java笔试试题练习(7)

[作者:fabuke]
2012-12-05 16:54

  public static final String FIVE = "伍";

  public static final String SIX = "陆";

  public static final String SEVEN = "柒";

  public static final String EIGHT = "捌";

  public static final String NINE = "玖";

  public static final String TEN = "拾";

  public static final String HUNDRED = "佰";

  public static final String THOUSAND = "仟";

  public static final String TEN_THOUSAND = "万";

  public static final String HUNDRED_MILLION = "亿";

  public static final String YUAN = "元";

  public static final String JIAO = "角";

  public static final String FEN = "分";

  public static final String DOT = ".";

  private static SimpleMoneyFormat formatter = null;

  private HashMap chineseNumberMap = new HashMap();

  private HashMap chineseMoneyPattern = new HashMap();

  private NumberFormat numberFormat = NumberFormat.getInstance();

  private SimpleMoneyFormat() {

  numberFormat.setMaximumFractionDigits(4);

  numberFormat.setMinimumFractionDigits(2);

  numberFormat.setGroupingUsed(false);

  chineseNumberMap.put("0", ZERO);

  chineseNumberMap.put("1", ONE);

  chineseNumberMap.put("2", TWO);

  chineseNumberMap.put("3", THREE);

  chineseNumberMap.put("4", FOUR);

  chineseNumberMap.put("5", FIVE);

  chineseNumberMap.put("6", SIX);

  chineseNumberMap.put("7", SEVEN);

  chineseNumberMap.put("8", EIGHT);

  chineseNumberMap.put("9", NINE);

  chineseNumberMap.put(DOT, DOT);

  chineseMoneyPattern.put("1", TEN);

  chineseMoneyPattern.put("2", HUNDRED);

  chineseMoneyPattern.put("3", THOUSAND);

  chineseMoneyPattern.put("4", TEN_THOUSAND);

  chineseMoneyPattern.put("5", TEN);

  chineseMoneyPattern.put("6", HUNDRED);

  chineseMoneyPattern.put("7", THOUSAND);

  chineseMoneyPattern.put("8", HUNDRED_MILLION);

  }

  public static SimpleMoneyFormat getInstance() {

  if (formatter == null)

  formatter = new SimpleMoneyFormat();

  return formatter;

  }

  public String format(String moneyStr) {

  checkPrecision(moneyStr);

  String result;

  result = convertToChineseNumber(moneyStr);

  result = addUnitsToChineseMoneyString(result);

  return result;

  }

  public String format(double moneyDouble) {

  return format(numberFormat.format(moneyDouble));

  }

  public String format(int moneyInt) {

  return format(numberFormat.format(moneyInt));

  }

  public String format(long moneyLong) {

  return format(numberFormat.format(moneyLong));

  }

  public String format(Number moneyNum) {

  return format(numberFormat.format(moneyNum));

  }

  private String convertToChineseNumber(String moneyStr) {

  String result;

  StringBuffer cMoneyStringBuffer = new StringBuffer();

  for (int i = 0; i < moneyStr.length(); i++) {

  cMoneyStringBuffer.append(chineseNumberMap.get(moneyStr.substring(i, i + 1)));

  }

  //拾佰仟万亿等都是汉字里面才有的单位,加上它们

  int indexOfDot = cMoneyStringBuffer.indexOf(DOT);

  int moneyPatternCursor = 1;

  for (int i = indexOfDot - 1; i > 0; i--) {

  cMoneyStringBuffer.insert(i, chineseMoneyPattern.get(EMPTY + moneyPatternCursor));

  moneyPatternCursor = moneyPatternCursor == 8 ? 1 : moneyPatternCursor + 1;

  }

  String fractionPart = cMoneyStringBuffer.substring(cMoneyStringBuffer.indexOf("."));

  cMoneyStringBuffer.delete(cMoneyStringBuffer.indexOf("."), cMoneyStringBuffer.length());

  while (cMoneyStringBuffer.indexOf("零拾") != -1) {

  cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零拾"), cMoneyStringBuffer.indexOf("零拾") + 2, ZERO);

  }

  while (cMoneyStringBuffer.indexOf("零佰") != -1) {

  cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零佰"), cMoneyStringBuffer.indexOf("零佰") + 2, ZERO);

  }

  while (cMoneyStringBuffer.indexOf("零仟") != -1) {

  cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零仟"), cMoneyStringBuffer.indexOf("零仟") + 2, ZERO);

  }

  while (cMoneyStringBuffer.indexOf("零万") != -1) {

  cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零万"), cMoneyStringBuffer.indexOf("零万") + 2, TEN_THOUSAND);

  }

  while (cMoneyStringBuffer.indexOf("零亿") != -1) {

  cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零亿"), cMoneyStringBuffer.indexOf("零亿") + 2, HUNDRED_MILLION);

  }

  while (cMoneyStringBuffer.indexOf("零零") != -1) {

  cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零零"), cMoneyStringBuffer.indexOf("零零") + 2, ZERO);

  }

  if (cMoneyStringBuffer.lastIndexOf(ZERO) == cMoneyStringBuffer.length() - 1)

  cMoneyStringBuffer.delete(cMoneyStringBuffer.length() - 1, cMoneyStringBuffer.length());

  cMoneyStringBuffer.append(fractionPart);

  result = cMoneyStringBuffer.toString();

  return result;

  }

  private String addUnitsToChineseMoneyString(String moneyStr) {

  String result;

  StringBuffer cMoneyStringBuffer = new StringBuffer(moneyStr);

  int indexOfDot = cMoneyStringBuffer.indexOf(DOT);

  cMoneyStringBuffer.replace(indexOfDot, indexOfDot + 1, YUAN);

  cMoneyStringBuffer.insert(cMoneyStringBuffer.length() - 1, JIAO);

  cMoneyStringBuffer.insert(cMoneyStringBuffer.length(), FEN);

  if (cMoneyStringBuffer.indexOf("零角零分") != -1)//没有零头,加整

  cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零角零分"), cMoneyStringBuffer.length(), "整");

  else

  if (cMoneyStringBuffer.indexOf("零分") != -1)//没有零分,加整

  cMoneyStringBuffer.replace(cMoneyStringBuffer.indexOf("零分"), cMoneyStringBuffer.length(), "整");

  else {

  if(cMoneyStringBuffer.indexOf("零角")!=-1)

  cMoneyStringBuffer.delete(cMoneyStringBuffer.indexOf("零角"),cMoneyStringBuffer.indexOf("零角")+2);

  // tmpBuffer.append("整");

  }

  result = cMoneyStringBuffer.toString();

  return result;

  }

  private void checkPrecision(String moneyStr) {

  int fractionDigits = moneyStr.length() - moneyStr.indexOf(DOT) - 1;

  if (fractionDigits > 2)

  throw new RuntimeException("金额" + moneyStr + "的小数位多于两位。"); //精度不能比分低

  }

  public static void main(String args[]) {

  System.out.println(getInstance().format(new Double(10010001.01)));

  }

  }

  3、继承时候类的执行顺序问题,一般都是选择题,问你将会打印出什么?

  答:父类:

  package test;

  public class FatherClass {

  public FatherClass() {

  System.out.println("FatherClass Create");

  }

  }

  子类:

  package test;

  import test.FatherClass;

  public class ChildClass extends FatherClass {

  public ChildClass() {

  System.out.println("ChildClass Create");

  }

  public static void main(String[] args) {

  FatherClass fc = new FatherClass();

  ChildClass cc = new ChildClass();

  }

  }

  输出结果:

  C:>java test.ChildClass

  FatherClass Create

  FatherClass Create

  ChildClass Create

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