我想将不同的字体行附加到JTextArea,但是最后一种字体似乎覆盖了另一种。请帮忙...importjava.awt.*;importjavax.swing.*;@SuppressWarnings("serial")publicclasstestextendsJFrame{privatestaticJTextAreareferenceTextArea=newJTextArea(10,10);privateJPanelpanel=newJPanel();publictest(){this.add(panel);panel.add(referenceTextArea);}publicst