JTextPaneにTabSetを設定してTabStopの文字列揃えをテストする

textPane.setText(String.join("\n",
    String.join("\t", "LEFT1", "CENTER1", "RIGHT1", "3.14"),
    String.join("\t", "LEFT22", "CENTER22", "RIGHT22", "12.3"),
    String.join("\t", "LEFT333", "CENTER333", "RIGHT333", "123.45"),
    String.join("\t", "LEFT4444", "CENTER4444", "RIGHT4444", "0.9876")));

// MutableAttributeSet attr = new SimpleAttributeSet();
Style attr = textPane.getStyle(StyleContext.DEFAULT_STYLE);
StyleConstants.setTabSet(attr, new TabSet(new TabStop[] {
    new TabStop(0f, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE),
    new TabStop(100f, TabStop.ALIGN_CENTER, TabStop.LEAD_NONE),
    new TabStop(200f, TabStop.ALIGN_RIGHT, TabStop.LEAD_NONE),
    new TabStop(250f, TabStop.ALIGN_DECIMAL, TabStop.LEAD_NONE)
    // new TabStop(300f, TabStop.ALIGN_BAR, TabStop.LEAD_NONE)
}));
textPane.setParagraphAttributes(attr, false);