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[英]How to get a keySet of HashMap filter by boolean value in Java?
[英]Get value from hashmap/keyset in java?
我有將兩個值放入Hashmap中,然后從另一個方法中訪問它們的代碼。 我正在遍歷一個值“ dog”,但是在方法的最后,我需要打印出與該“ dog”值有關的“ race”。
這是我到目前為止的內容:
DecimalFormat df = new DecimalFormat("#.##");
for (String dog: data.keySet()) { // use the dog
String dogPage = "http://www.gbgb.org.uk/raceCard.aspx?dogName=" + dog;
Document doc1 = Jsoup.connect(dogPage).get();
// System.out.println("Dog name: " + dog);
Element tblHeader = doc1.select("tbody").first();
for (Element element1 : tblHeader.children()){
String position = element1.select("td:eq(4)").text();
int starts = (position.length() + 1) / 4;
int starts1 = starts;
// System.out.println("Starts: " + starts);
Pattern p = Pattern.compile("1st");
Matcher m = p.matcher(position);
int count = 0;
while (m.find()){
count +=1;
}
double firsts = count / (double)starts1 * 100;
String firstsStr = (df.format(firsts));
// System.out.println("Firsts: " + firstsStr + "%");
Pattern p2 = Pattern.compile("2nd");
Matcher m2 = p2.matcher(position);
int count2 = 0;
while (m2.find()){
count2 +=1;
}
double seconds = count2 / (double)starts1 * 100;
String secondsStr = (df.format(seconds));
// System.out.println("Seconds: " + secondsStr + "%");
Pattern p3 = Pattern.compile("3rd");
Matcher m3 = p3.matcher(position);
int count3 = 0;
while (m3.find()){
count3 +=1;
}
double thirds = count3 / (double)starts1 * 100;
String thirdsStr = (df.format(thirds));
// System.out.println("Thirds: " + thirdsStr + "%");
if (starts1 > 20 && firsts < 20 && seconds > 30 && thirds > 20){
System.out.println("Dog name: " + dog);
// System.out.println("Race: " + race);
System.out.println("Firsts: " + firstsStr + "%");
System.out.println("Seconds: " + secondsStr + "%");
System.out.println("Thirds: " + thirdsStr + "%");
System.out.println("");
}
}
我是否可以使用類似於“ String dog:data.keySet())”的值來獲取“ Race”的值? 例如:字符串競賽:data.keySet())?
以前的方法:
Document doc = Jsoup.connect(
"http://www.sportinglife.com/greyhounds/abc-guide").get();
Element tableHeader = doc.select("tbody").first();
Map<String, String> data = new HashMap<>();
for (Element element : tableHeader.children()) {
// Here you can do something with each element
if (element.text().indexOf("Pelaw Grange") > 0
|| element.text().indexOf("Shawfield") > 0
|| element.text().indexOf("Shelbourne Park") > 0
|| element.text().indexOf("Harolds Cross") > 0) {
// do nothing
} else {
String dog = element.select("td:eq(0)").text();
String race = element.select("td:eq(1)").text();
data.put(dog, race);
}
非常感謝任何幫助,謝謝!
搶
我假設HashMap
的值部分是Race
。
如果是,那么您可以執行以下操作:
String race = data.get(dog);
在當前代碼中,您正在執行以下操作:
for (String dog: data.keySet()) { // use the dog
String race = data.get(dog); // this will give the value of race for the key dog
// using dog to do fetch details from site...
}
您還可以執行以下操作:
for (Entry<String, String> entry: data.entrySet()) {
String dog = entry.getKey();
String race = entry.getValue();
// using dog to do fetch details from site...
}
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