Java Utililty Methods Swing Font Change

List of utility methods to do Swing Font Change

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Description

The list of methods to do Swing Font Change are organized into topic(s).

Method

voidchangeDefaultFontSize(int fontSize)
Code from http://stackoverflow.com/questions/1236231/managing-swing-ui-default-font-sizes-without-quaqua 
UIDefaults defaults = UIManager.getDefaults();
Enumeration<Object> keys = defaults.keys();
while (keys.hasMoreElements()) {
    Object key = keys.nextElement();
    if ((key instanceof String) && (((String) key).endsWith(".font"))) {
        FontUIResource font = (FontUIResource) UIManager.get(key);
        defaults.put(key, new FontUIResource(font.getFontName(), font.getStyle(), fontSize));
voidchangeFont(JComponent comp, double scaleFactor, int style)
Scale the original font of a component by a given factor and change the style 
Font font = comp.getFont();
font = scale(font, scaleFactor);
comp.setFont(font.deriveFont(style));
voidChangeFont(JComponent comp, int wheel_rotation)
Change Font 
int size_inc = 0;
if (wheel_rotation > 0)
    size_inc++;
else if (wheel_rotation < 0)
    size_inc--;
if (size_inc != 0) {
    Font f = new Font(comp.getFont().getName(), comp.getFont().getStyle(),
            comp.getFont().getSize() + size_inc);
...
voidchangeFontSize(final int size)
change Font Size 
UIDefaults defaults = UIManager.getLookAndFeelDefaults();
    float baseSize = getBaseFontSize();
    growthPercentage = size / baseSize;
defaults.keySet().stream().filter(keyObj -> keyObj instanceof String).forEach(keyObj -> {
    String key = (String) keyObj;
    if (key.contains("font")) {
...
FontchangeFontSize(Font font, float factor)
change Font Size 
int size = (int) Math.round(factor * font.getSize());
if (size < 6)
    size = Math.max(6, font.getSize());
return new Font(font.getName(), font.getStyle(), size);
FontchangeFontStyle(Font font, int style)
change Font Style 
return new Font(font.getName(), style, font.getSize());
JComponentchangeFontToItalic(final JComponent component)
Changes the font of a component to ITALIC. 
component.setFont(component.getFont().deriveFont(Font.ITALIC));
return component;
voidinstallFont(Component c, Font font)
install Font 
Font f = c.getFont();
if ((f == null) || ((f instanceof UIResource)))
    c.setFont(font);
voidinstallFont(Component c, Font font)
install Font 
Font f = c.getFont();
if (f == null || f instanceof UIResource) {
    c.setFont(font);