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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.util.function.Predicate;
  7. import java.util.stream.Collectors;
  8.  
  9. /* Name of the class has to be "Main" only if the class is public. */
  10. class Ideone
  11. {
  12.  
  13.  
  14.     static class StockUtil {
  15.  
  16.         public static Predicate<Stock> isLessThanLimit(Double limit) {
  17.             return s -> s.tick < limit;
  18.         }
  19.  
  20.         public static String toUpperCase(String stock) {
  21.             return stock.toUpperCase();
  22.         }
  23.     }
  24.  
  25.   	public static void main (String[] args) throws java.lang.Exception {
  26.         List<Stock> stocks = new ArrayList<>(Arrays.asList(new Stock("AMZ", 312.0),
  27.                 new Stock("Yahoo", 212.0),
  28.                 new Stock("ORCL", 512.0),
  29.                 new Stock("SAP", 112.0),
  30.                 new Stock("Google", 412.0),
  31.                 new Stock("FB", 12.0),
  32.                 new Stock("TWT", 315.0)));
  33.  
  34.  
  35.         //print list of stock names below 400 in uppercase
  36.         System.out.println(stocks.stream().filter(StockUtil.isLessThanLimit(400.0))
  37.                 .map(Stock::getSymbol)
  38.                 .map(StockUtil::toUpperCase)
  39.                 .collect(Collectors.toList())
  40.         );
  41.     }
  42.  
  43.     static class Stock {
  44.  
  45.         String symbol;
  46.  
  47.         double tick;
  48.  
  49.         public Stock(String symbol, double tick) {
  50.             this.symbol = symbol;
  51.             this.tick = tick;
  52.         }
  53.  
  54.         public String getSymbol() {
  55.             return symbol;
  56.         }
  57.  
  58.         public void setSymbol(String symbol) {
  59.             this.symbol = symbol;
  60.         }
  61.  
  62.         public double getTick() {
  63.             return tick;
  64.         }
  65.  
  66.         public void setTick(double tick) {
  67.             this.tick = tick;
  68.         }
  69.     }
  70.  
  71. }
Success #stdin #stdout 0.09s 711680KB
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[AMZ, YAHOO, SAP, FB, TWT]
https://ideone.com/1a5pkL
language:
Java (12.0.1)
created:
7 years ago
visibility:
public

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