Java Code Examples for java.util.Hashtable#contains()

public static void main(String[] args) {

    //create Hashtable object
    Hashtable ht = new Hashtable();

    //add key value pairs to Hashtable
    ht.put("1", "One");
    ht.put("2", "Two");
    ht.put("3", "Three");

    /*
      To check whether a particular value exists in Hashtable use
      boolean contains(Object key) method of Hashtable class.
      It returns true if the value is mapped to one or more keys in the
      Hashtable otherwise false.
    */

    boolean blnExists = ht.contains("Two");
    System.out.println("Two exists in Hashtable ? : " + blnExists);
  }
 

public static void main(String[] args) {

        //create Hashtable object
        Hashtable ht = new Hashtable();

        //add key value pairs to Hashtable
        ht.put("1", "One");
        ht.put("2", "Two");
        ht.put("3", "Three");

    /*
      To check whether a particular value exists in Hashtable use
      boolean contains(Object key) method of Hashtable class.
      It returns true if the value is mapped to one or more keys in the
      Hashtable otherwise false.
    */

        boolean blnExists = ht.contains("Two");
        System.out.println("Two exists in Hashtable ? : " + blnExists);
    }
 

/**
 * Check user's number with the system hidden number return the outcome with
 * xAyB. x is the correct guess with the same digit in the exact position. y is
 * the correct guess with the same digit but different position.
 *
 * @return outcome as string
 */

public String check(int[] digits) {
	int numberOfA = 0;
	int numberOfB = 0;
	// table to record any checked digit
	Hashtable<Integer, Integer> table = new Hashtable<Integer, Integer>();
	// random numbers
	int[] hiddenNumbers = numbers.getNumbers();
	for (int i = 0; i < digits.length; i++) {
		if (!table.contains(digits[i])) {
			boolean foundA = false;
			boolean foundB = false;
			for (int j = 0; j < hiddenNumbers.length; j++) {
				if (digits[i] == hiddenNumbers[j]) { // found this digit in the hidden number
					if (i == j) { // same position
						foundA = true;
					} else { // different position
						foundB = true;
					}
				}
			}
			if (foundA) { // same position
				numberOfA++;
				table.put(digits[i], digits[i]); // record this digit to avoid checking the same digit
			} else {
				if (foundB) { // different position
					numberOfB++;
					table.put(digits[i], digits[i]); // record this digit to avoid checking the same digit
				}
			}
		}
	}
	return numberOfA + "A" + numberOfB + "B";
}
 

/**
 * Check user's number with the system hidden number return the outcome with
 * xAyB. x is the correct guess with the same digit in the exact position. y is
 * the correct guess with the same digit but different position.
 * 
 * @return outcome as string
 */

public String check(int[] digits) {
	int numberOfA = 0;
	int numberOfB = 0;
	// table to record any checked digit
	Hashtable<Integer, Integer> table = new Hashtable<Integer, Integer>();
	for (int i = 0; i < digits.length; i++) {
		if (!table.contains(digits[i])) {
			boolean foundA = false;
			boolean foundB = false;
			for (int j = 0; j < numbers.length; j++) {
				if (digits[i] == numbers[j]) { // found this digit in the hidden number
					if (i == j) { // same position
						foundA = true;
					} else { // different position
						foundB = true;
					}
				}
			}
			if (foundA) { // same position
				numberOfA++;
				table.put(digits[i], digits[i]); // record this digit to avoid checking the same digit
			} else {
				if (foundB) { // different position
					numberOfB++;
					table.put(digits[i], digits[i]); // record this digit to avoid checking the same digit
				}
			}
		}
	}
	return numberOfA + "A" + numberOfB + "B";
}
 

/**
 * Check user's number with the system hidden number return the outcome with
 * xAyB. x is the correct guess with the same digit in the exact position. y is
 * the correct guess with the same digit but different position.
 *
 * @return outcome as string
 */

public String check(int[] digits) {
	int numberOfA = 0;
	int numberOfB = 0;
	// table to record any checked digit
	Hashtable<Integer, Integer> table = new Hashtable<Integer, Integer>();
	// random numbers
	int[] hiddenNumbers = numbers.getNumbers();
	for (int i = 0; i < digits.length; i++) {
		if (!table.contains(digits[i])) {
			boolean foundA = false;
			boolean foundB = false;
			for (int j = 0; j < hiddenNumbers.length; j++) {
				if (digits[i] == hiddenNumbers[j]) { // found this digit in the hidden number
					if (i == j) { // same position
						foundA = true;
					} else { // different position
						foundB = true;
					}
				}
			}
			if (foundA) { // same position
				numberOfA++;
				table.put(digits[i], digits[i]); // record this digit to avoid checking the same digit
			} else {
				if (foundB) { // different position
					numberOfB++;
					table.put(digits[i], digits[i]); // record this digit to avoid checking the same digit
				}
			}
		}
	}
	return numberOfA + "A" + numberOfB + "B";
}
 

private void saveLookupLists() throws FileNotFoundException {
	PrintWriter pwCommands = new PrintWriter(commandDocPluginSaveFolder.getAbsolutePath() + "/lookup.list");
	PrintWriter pwFunctions = new PrintWriter(functionDocPluginSaveFolder.getAbsolutePath() + "/lookup.list");
	Hashtable<String, String> ignoredCommands = commandsDocRetriever.getIgnoredCommands();
	for (PsiElementLinkType type : PsiElementLinkType.allTypes) {
		if (type.type.equals(PSI_ELE_TYPE_COMMAND)) {
			for (String command : type.linkNames) {
				if (!ignoredCommands.contains(command)) {
					pwCommands.println(command);
				}
			}
		} else if (type.type.equals(PSI_ELE_TYPE_FUNCTION)) {
			for (String function : type.linkNames) {
				pwFunctions.println(function);
			}
		} else {
			throw new IllegalStateException("dude");
		}
	}

	pwCommands.flush();
	pwCommands.close();

	pwFunctions.flush();
	pwFunctions.close();
	System.out.println("\n\nSaved lookup lists");
}
 

public void hashtablesCantContainNull(Hashtable h) {
    h.put("a", null);
    h.put(null, "a");
    h.get(null);
    h.contains(null);
    h.containsKey(null);
    h.containsValue(null);
    h.remove(null);

}
 

private void saveLookupLists() throws FileNotFoundException {
	PrintWriter pwCommands = new PrintWriter(commandDocPluginSaveFolder.getAbsolutePath() + "/lookup.list");
	PrintWriter pwFunctions = new PrintWriter(functionDocPluginSaveFolder.getAbsolutePath() + "/lookup.list");
	Hashtable<String, String> ignoredCommands = commandsDocRetriever.getIgnoredCommands();
	for (PsiElementLinkType type : PsiElementLinkType.allTypes) {
		if (type.type.equals(PSI_ELE_TYPE_COMMAND)) {
			for (String command : type.linkNames) {
				if (!ignoredCommands.contains(command)) {
					pwCommands.println(command);
				}
			}
		} else if (type.type.equals(PSI_ELE_TYPE_FUNCTION)) {
			for (String function : type.linkNames) {
				pwFunctions.println(function);
			}
		} else {
			throw new IllegalStateException("dude");
		}
	}

	pwCommands.flush();
	pwCommands.close();

	pwFunctions.flush();
	pwFunctions.close();
	System.out.println("\n\nSaved lookup lists");
}
 

private void addToListActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_addToListActionPerformed
        String name = (String)componentName.getSelectedItem();
        if(name.length() > 0) {
            name += ".";
        } 
        switch(style.getSelectedIndex()) {
            case 0:
                name += "sel#";
                break;
            case 2:
                name += "press#";
                break;
            case 3:
                name += "dis#";
                break;
        }
        name += "border";
        if(!((DefaultListModel)appliesTo.getModel()).contains(name)) {
            Hashtable h = res.getTheme(theme);
            if(h.contains(name)) {
                if(JOptionPane.showConfirmDialog(this,
                        "A border already exists for this component,\ndo you want to replace it?",
                        "Already Exists",
                        JOptionPane.YES_NO_OPTION) != JOptionPane.YES_OPTION) {
                    return;
                }
            }
            ((DefaultListModel)appliesTo.getModel()).addElement(name);
        }
}