Java/Numeric - Revision history

Admin: /* Interpret character as digit */

2017-06-18T20:56:21Z

Interpret character as digit

← Older revision		Revision as of 20:56, 18 June 2017
Line 56:		Line 56:
	throw new IllegalArgumentException("Malformed input. Numeric strings only.");		throw new IllegalArgumentException("Malformed input. Numeric strings only.");
	}		}
			j++;
	}		}

Admin: /* Interpret character as digit */

2017-06-18T20:55:04Z

Interpret character as digit

← Older revision		Revision as of 20:55, 18 June 2017
Line 49:		Line 49:
	if( Character.isDigit(c) ) {		if( Character.isDigit(c) ) {
	z = Character.digit(c,10);		z = Character.digit(c,10);
	sb.append(z*z);		sb.append(z*z);
	if(j<q.size()-1) {		if(j<q.size()-1) {
	sb.append(", ");		sb.append(", ");
	}		}

Admin: /* Interpret character as digit */

2017-06-18T20:53:42Z

Interpret character as digit

← Older revision		Revision as of 20:53, 18 June 2017
Line 23:		Line 23:

	<pre>		<pre>
	~~///////////////////////////////////////////////////////////~~
	~~// Create a container of digit-characters~~
	~~String n = "2432902008176640000";~~
	~~char[] narr = n.toCharArray();~~

			///////////////////////////////////////////////////////////
			// Create a container of digit-characters
			String n = "2432902008176640000";
			char[] narr = n.toCharArray();


	~~///////////////////////////////////////////////////////////~~
	~~// Populate a queue with characters~~
	~~Queue<Character> q = new LinkedList<Character>();~~
	~~for(int i=0; i<narr.length; i++) {~~
	~~q.add(narr[i]);~~
	}

			///////////////////////////////////////////////////////////
			// Populate a queue with characters
			Queue<Character> q = new LinkedList<Character>();
			for(int i=0; i<narr.length; i++) {
			q.add(narr[i]);
			}

	///////////////////////////////////////////////////////////
	// Print out the square of each character interpreted as a digit		///////////////////////////////////////////////////////////
	int j = 0;		// Print out the square of each character interpreted as a digit
	for(Character c : q) {		StringBuilder sb = new StringBuilder();
	z = -10000;
	if( c.isDigit() ) {		int j = 0;
	z = Character.digit(c,10);		for(Character c : q) {
	} else {		int z = -10000;
	throw new IllegalArgumentException("Malformed input. Numeric strings only.");		// Character.isDigit() and Character.digit() are static methods
	}		if( Character.isDigit(c) ) {
	~~if(j<q.size()-1) {~~		z = Character.digit(c,10);
	System.out.println(~~" , "~~);		sb.append(z*z);
	}		if(j<q.size()-1) {
	}		sb.append(", ");
			}
			} else {
			throw new IllegalArgumentException("Malformed input. Numeric strings only.");
			}
			}


			System.out.println(sb.toString());
	</pre>		</pre>

Admin: /* Interpret character as digit */

2017-06-18T20:47:05Z

Interpret character as digit

← Older revision		Revision as of 20:47, 18 June 2017
Line 27:		Line 27:
	String n = "2432902008176640000";		String n = "2432902008176640000";
	char[] narr = n.toCharArray();		char[] narr = n.toCharArray();
	~~///////////////////////////////////////////////////////////~~


Line 37:		Line 37:
	}		}


			///////////////////////////////////////////////////////////
	// Print out the square of each character interpreted as a digit		// Print out the square of each character interpreted as a digit
	int j = 0;		int j = 0;

Admin: /* Interpret character as digit */

2017-06-18T20:46:46Z

Interpret character as digit

← Older revision		Revision as of 20:46, 18 June 2017
Line 40:		Line 40:
	int j = 0;		int j = 0;
	for(Character c : q) {		for(Character c : q) {
	z = -1;		z = -10000;
	if( c.isDigit() ) {		if( c.isDigit() ) {
	z = Character.digit(c,10);		z = Character.digit(c,10);

Admin: /* Interpret character as digit */

2017-06-18T20:46:23Z

Interpret character as digit

← Older revision		Revision as of 20:46, 18 June 2017
Line 23:		Line 23:

	<pre>		<pre>
	String n = "~~283982749847594837~~";		///////////////////////////////////////////////////////////
			// Create a container of digit-characters
			String n = "2432902008176640000";
			char[] narr = n.toCharArray();
			///////////////////////////////////////////////////////////


			///////////////////////////////////////////////////////////
	// Populate a queue with characters		// Populate a queue with characters
	Queue<Character> q = new LinkedList<Character>();		Queue<Character> q = new LinkedList<Character>();
	~~char[] narr = n.toCharArray();~~
	for(int i=0; i<narr.length; i++) {		for(int i=0; i<narr.length; i++) {
	q.add(narr[i]);		q.add(narr[i]);

Admin: /* Check if a string is numeric */

2017-06-18T20:43:04Z

Check if a string is numeric

@@ Line 18: / Line 18: @@
 </pre>
 =Flags=
 {{CSFlag}}

Admin at 20:32, 18 June 2017

2017-06-18T20:32:51Z

← Older revision		Revision as of 20:32, 18 June 2017
Line 1:		Line 1:
			==Check if a string is numeric==

	To check if a String in Java is numeric, build a simple utility function:		To check if a String in Java is numeric, build a simple utility function:

Line 4:		Line 6:
	public static boolean isNumeric(String str)		public static boolean isNumeric(String str)
	{		{
	try		try
	{		{
	double d = Double.parseDouble(str);		double d = Double.parseDouble(str);
	}		}
	catch(NumberFormatException nfe)		catch(NumberFormatException nfe)
	{		{
	return false;		return false;
	}		}
	return true;		return true;
	}		}
	</pre>		</pre>

Admin at 17:41, 13 June 2017

2017-06-13T17:41:02Z

← Older revision		Revision as of 17:41, 13 June 2017
Line 15:		Line 15:
	}		}
	</pre>		</pre>


			=Flags=

			{{CSFlag}}

Admin: Created page with "To check if a String in Java is numeric, build a simple utility function:

 public static boolean isNumeric(String str)   {     try     {       double d = Double.parseDou..."

2017-06-13T17:40:35Z

Created page with "To check if a String in Java is numeric, build a simple utility function: <pre> public static boolean isNumeric(String str) { try { double d = Double.parseDou..."

New page

To check if a String in Java is numeric, build a simple utility function:

<pre>
public static boolean isNumeric(String str)
{
try
{
double d = Double.parseDouble(str);
}
catch(NumberFormatException nfe)
{
return false;
}
return true;
}
</pre>