How do I get the available font names?

By I Wayan Saryada in AWT, Core API 0 Comment 
package org.kodejava.awt;

import java.awt.Font;
import java.awt.GraphicsEnvironment;

public class FontNameList {
    public static void main(String[] args) {
        // Get all available fonts from GraphicsEnvironment
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        Font[] fonts = ge.getAllFonts();

        // Iterates all available fonts and get their name and family name
        for (Font font : fonts) {
            String fontName = font.getName();
            String familyName = font.getFamily();

            System.out.println("Font: " + fontName + "; family: " + familyName);
        }
    }
}

Here are some fonts name printed from the code snippet above:

Font: Agency FB; family: Agency FB
Font: Agency FB Bold; family: Agency FB
Font: Algerian; family: Algerian
Font: Arial; family: Arial
Font: Arial Black; family: Arial Black
Font: Arial Bold; family: Arial
Font: Arial Bold Italic; family: Arial
Font: Arial Italic; family: Arial
Font: Arial Narrow; family: Arial Narrow
Font: Arial Narrow Bold; family: Arial Narrow
...

How do I parse a number for a locale?

By I Wayan Saryada in Core API, Text Package 0 Comment 
package org.kodejava.text;

import java.util.Locale;
import java.text.NumberFormat;
import java.text.ParseException;

public class LocaleNumberParse {
    public static void main(String[] args) {
        try {
            // In this example we are trying to parse a number string in a
            // defined format. Basically we want to covert the string for a
            // locale into a correct number value.
            Number number =
                NumberFormat.getNumberInstance(Locale.JAPAN).parse("25,000.75");

            // Just do some stuff with the number from the parse process
            if (number instanceof Long) {
                System.out.println("This number is instanceof Long and the " +
                    "value is: " + number.longValue());
            } else if (number instanceof Double) {
                System.out.println("This number is instanceof Double and the " +
                    "value is: " + number.doubleValue());
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }

    }
}

The code snippet print out the following result:

This number is instanceof Double and the value is: 25000.75

How do I format a number for a locale?

By I Wayan Saryada in Core API, Text Package 0 Comment 
package org.kodejava.text;

import java.util.Locale;
import java.text.NumberFormat;

public class LocaleNumberFormat {
    public static void main(String[] args)  {
        // Format number for Italy locale. In Italy locale the decimal point
        // symbol is a comma.
        NumberFormat formatter = NumberFormat.getNumberInstance(Locale.ITALY);
        try {
            String number = formatter.format(195325.75);
            System.out.println("Number in Italy: " + number);
        } catch (NumberFormatException e) {
            e.printStackTrace();
        }

        // Format number for Japan locale. In Japan locale the decimal point
        // symbol is a dot.
        formatter = NumberFormat.getNumberInstance(Locale.JAPAN);
        try {
            String number = formatter.format(195325.75);
            System.out.println("Number in Japan: " + number);
        } catch (NumberFormatException e) {
            e.printStackTrace();
        }
    }
}

The code snippet output:

Number in Italy: 195.325,75
Number in Japan: 195,325.75

How do I iterate a subset of a string?

By I Wayan Saryada in Core API, Text Package 0 Comment 
package org.kodejava.text;

import java.text.CharacterIterator;
import java.text.StringCharacterIterator;

public class IterateSubstringExample {
    private static final String text =
        "How razorback-jumping frogs can level six piqued gymnasts";

    public static void main(String[] args) {
        CharacterIterator it = new StringCharacterIterator(text, 4, 27, 5);

        // In this loop we just iterator a subset of character defined in the
        // StringCharacterIterator above. It reads from the 4 index of the
        // string up to the 27 character. So it will just take the following
        // string "razorback-jumping frogs"
        for (char ch = it.first(); ch != CharacterIterator.DONE; ch = it.next()) {
            System.out.print(ch);
        }
    }
}

The output of the code snippet above will be:

razorback-jumping frogs

How do I reverse a string using CharacterIterator?

By I Wayan Saryada in Core API, Text Package 0 Comment

In this example we use the java.text.CharacterIterator implementation class java.text.StringCharacterIterator to reverse a string. It’s done by reading a string from the last index up to the beginning of the string.

package org.kodejava.text;

import java.text.CharacterIterator;
import java.text.StringCharacterIterator;

public class StringCharacterIteratorReverseExample {
    private static final String text = "Jackdaws love my big sphinx of quartz";

    public static void main(String[] args) {
        CharacterIterator it = new StringCharacterIterator(text);

        System.out.println("Before = " + text);
        System.out.print("After  = ");
        // Iterates a string from the last index to the beginning.
        for (char ch = it.last(); ch != CharacterIterator.DONE; ch = it.previous()) {
            System.out.print(ch);
        }
    }
}

The result of the code snippet above:

Before = Jackdaws love my big sphinx of quartz
After  = ztrauq fo xnihps gib ym evol swadkcaJ