1*{2margin:0px;3padding:0px;4}56body{7background:#e5e6d0;8}910#header,#menu,#banner,#main,#footer{11margin:0pxauto;12width:1200px;13}14#header{15height:100px;16...

1importjavax.swing.*;2importjava.awt.*;3importjava.awt.event.*;4importjavax.swing.border.*;56publicclassLoanCalculatorextendsJFrame{7privateclassButtonListeneri...

要实现Rational类的加减乘除，要实现其可比较性，要覆盖toString()方法，要实现不同数据类型的转换等。1packagechapter14;23publicclassRationalextendsNumberimplementsComparable{4privatelongnumerator=0;5priva...