Map<Object, List<Element>> groupeUniqueMap =values.stream().collect(Collectors.groupingBy(this::getCompositeGroupKey, Collectors.toList()));
      if(groupeUniqueMap.containsKey(Arrays.asList(null,null,null,null,null,null,null)))
        return values;
      return doReturn();
By ThisIsFine, 2020-07-02 18:41:35
        if (!rtrId.isPresent()) {
            ...
        } else if (identityId.isPresent() && rtrId.isPresent()) {
            ...
        }
        

A treasured knife protects

By Dunia, 2018-09-18 10:34:19
public class SentCon3 {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);

		double input;
		char choice;
		System.out.println("**** Menu-Driven Temperature Converter*****");
		System.out.println("only lowwer case is vaild");
		System.out.print("Enter the value to beconverted==> ");
		input = scan.nextDouble();
		System.out.println("What is your choice?");
		System.out.println("a)Fahrenheit to Celsius");
		System.out.println("b)Celsius to Fahrenheit");
		System.out.println("c)Kelvin to Celsius");
		System.out.println("d)Celsius to Kelvin");
		System.out.println("e)Kelvin to Fahrenheit");
		System.out.println("f)Fahrenheit to Kelvin.");
		System.out.print("Please enter your choice ==>");
		choice = scan.next().charAt(0);

		while (choice == 'a') {
			System.out.println((input / 5) * 9 + 32);
			break;
		}
		while (choice == 'b') {
			System.out.println((input - 32) * 5 / 9);
			break;
		}
		while (choice == 'c') {
			System.out.println(input - 273.15);

			break;
		}
		while (choice == 'd') {
			System.out.println(input + 273.15);
			break;
		}
		while (choice == 'e') {
			System.out.println((input - 273.5) * 9 / 5 + 32);
			break;
		}
		while (choice == 'f') {
			System.out.println((input + 459.67) * 5 / 9);
			break;
		}

	}

}

use while as if!!!!

By person, 2020-10-13 03:01:18
if (baza[mCurrentIndex] == Boolean.TRUE) {
            if (mCurrentIndex != baza.length-1) {
                up();
                nextQuestion();
            }

            if (mCurrentIndex == baza.length) {
                WypiszWynik();
            }

        }

so you have an array of booleans and you're comparing it to Boolean.TRUE why

By pain, 2017-10-31 21:58:54


public static MyClass {
    private static volatile ProcessManager singleton = null;
    
    public static ProcessManager getInstance() throws Exception {
        if (singleton == null) {
            synchronized (MyClass.class) {
                if (singleton == null) {
                    singleton = new ProcessManager();
                }
            }
        }
        return singleton;
    }
}

The double-checking was invented prior to Java5.

The purpose is if the field isn't null, you don't have to synchronize. But since the java memory model specification was cleaned up and Synchronize/Volatile were given much better specification and semantics it is totally useless boilerplate that you should only write if you have to support Java4. There is a Google Tech Talk that covers this.

By cody, 2017-12-12 08:02:01

"  ".split(" ");

Very weird code found multiple times in old code base.

By heldt, 2017-12-12 12:03:14
String s = "string";

String.valueOf(s).toString();

// just to make sure it's a damn string
while(!s instanceof String) {
    String.valueOf(s).toString();
}
By Anonymous, 2021-01-23 17:11:10
public enum DataSize {
    BYTE,
    DOUBLE_BYTE,
    INT,
    LONG;
    
    public boolean isEqualTo(Object value) {
        if(value instanceof Byte && this.equals(BYTE)) {
            return true;
        } else if ((value instanceof Character || value instanceof Short) && this.equals(DOUBLE_BYTE)) {
            return true;
        } else if ((value instanceof Integer) && this.equals(INT)) {
            return true;
        } else if ((value instanceof Long) && this.equals(LONG)) {
            return true;
        }
        return false;
    }
}
By DevHONK, 2021-02-22 15:21:03
public List<Location> searchLocations(final String phrase) {
        final String like = phrase.replaceAll("(\\s)", "%$1") + "%";
        final List<Location> result = getLocations(
                "replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(replace(\n" +
                        "replace(lower(name),'.',' '),\n" +
                        "'á','a'),\n" +
                        "'é','e'),\n" +
                        "'í','i'),\n" +
                        "'ĺ','l'),\n" +
                        "'ó','o'),\n" +
                        "'ŕ','r'),\n" +
                        "'ú','u'),\n" +
                        "'ý','y'),\n" +
                        "'č','c'),\n" +
                        "'ď','s'),\n" +
                        "'ľ','l'),\n" +
                        "'ň','n'),\n" +
                        "'š','s'),\n" +
                        "'ť','t'),\n" +
                        "'ž','z'),\n" +
                        "'ä','a'),\n" +
                        "'ô','o') LIKE lower(?)\n" +
                        "ORDER BY CASE country_code WHEN 'SK' THEN 0 ELSE 1 END, length(name), name", like);
        return result;
    }

Author: I am satisfied with the project and I don't think I have anything to be ashamed of

By Anonymous, 2020-07-16 10:49:27
final int two_fifty_five_hex = 0xFF
final int two_fifty_five_dec = 255

One is in hex but the other is in decimal! Watch out, make sure you use the correct 255, not the other 255.

By Anonymous, 2020-04-28 14:52:27
public void sleep(long duration) {
    long start = System.currentTimeMillis();
    while(true) {
        if (System.currentTimeMillis() - start >= duration)
            break;
    }
}
By imaN NeO, 2018-10-28 09:35:15
try {
    synchronized(this) {
        Object obj = null;

        if (obj.hashCode() == -1) {
            obj = new Object();
        }
    }
} catch (Throwable t) {
    throw t;
} finally {
    try {
        synchronized(this) {
            Object obj = null;

            if (obj.hashCode() == -1) {
                obj = new Object();
            }
        }
    } catch (Throwable t) {
        throw t;
    } finally {
        try {
            synchronized(this) {
                Object obj = null;

                if (obj.hashCode() == -1) {
                    obj = new Object();
                }
            }
        } catch (Throwable t) {
            throw t;
        } finally {
            System.exit(1);
        }
    }
}

Cool code

By Conclure, 2020-10-30 02:26:02
class PythonClass {
    protected boolean True = true;
    protected boolean False = false;
    protected Object None = null;
}

class MyClass extends PythonClass {
    String do_something(Object foo) {
        if (foo == False)
            return ""                                  ;
        
        
        else if (foo == None)
            return "!"                                 ;
            
        else if (foo == True)
            return "Yay!"                              ;
    }
}

Yikes

By imaginedev, 2021-04-03 02:44:52
	public static int findSplitVariable(LinkedList<ByteDataRow> matrix) {
		LinkedList<ByteDataRow> list = new LinkedList<ByteDataRow>();
		int maxNoOfZeros = 0;
		int maxNoOfOnes = 0;
		int varId = -1;
		int[] NoOfOnesInColumn = new int[matrix.get(0).getInVars().length];


		for (ByteDataRow bdr : matrix) {
			int tmpNoOfZeros = bdr.getNumberOfZeros();
			if (maxNoOfZeros < tmpNoOfZeros) {
				list.clear();
				list.add(bdr.clone());
				maxNoOfZeros = tmpNoOfZeros;
			} else if (maxNoOfZeros == tmpNoOfZeros) {
				list.add(bdr.clone());
			}
		}

		for (ByteDataRow bdr : list) {
			byte[] vars = bdr.getInVars();
			for (int i = 0; i < vars.length; i++) {
				NoOfOnesInColumn[i] = NoOfOnesInColumn[i]
						+ Byte.compare(vars[i], Byte.parseByte("0"));
				if (NoOfOnesInColumn[i] > maxNoOfOnes) {
					maxNoOfOnes = NoOfOnesInColumn[i];
					varId = i;
				}
			}
		}

		return varId;
	}

	public static int findSplitVariable(LinkedList<ByteDataRow> matrix, int varIdx) {
		LinkedList<ByteDataRow> list = new LinkedList<ByteDataRow>();
		int maxNoOfZeros = 0;
		int maxNoOfOnes = 0;
		int varId = -1;
		int[] NoOfOnesInColumn = new int[matrix.get(0).getInVars().length];

		// Wybierz kostkÍ z najwiÍkszπ liczbπ zer.
		for (ByteDataRow bdr : matrix) {
			int tmpNoOfZeros = bdr.getNumberOfZeros();
			if (maxNoOfZeros < tmpNoOfZeros) {
				list.clear();
				list.add(bdr.clone());
				maxNoOfZeros = tmpNoOfZeros;
			} else if (maxNoOfZeros == tmpNoOfZeros) {
				list.add(bdr.clone());
			}
		}

		for (ByteDataRow bdr : list) {
			byte[] vars = bdr.getInVars();
			for (int i = 0; i < vars.length; i++) {
				NoOfOnesInColumn[i] = NoOfOnesInColumn[i]
						+ Byte.compare(vars[i], Byte.parseByte("0"));
				if (NoOfOnesInColumn[i] > maxNoOfOnes) {
					maxNoOfOnes = NoOfOnesInColumn[i];
					varId = i;
				}
			}
		}

		return varId;
	}

There are two methods findSplitVariable. Second one takes extra parameter (varIdx) that is not used anywhere.

By Paul, 2018-02-17 14:47:37
if (responseCode / 100 == 2) {//success
    return handleSuccess();
} else if (responseCode == 401) {
    return handleNotAuthorized();
} else {
    // something else
} 
By Anonymous, 2019-01-29 09:41:13