如何在Java中利用图形界面技术设计一个能够完成加、减、乘、除和取余...答:package test;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Z extends JFrame implements ActionListener, FocusListener { private String[] total = { "1", "2", "3", "+", "4", "5", "6", "-", "7", "8", "9", "*", "0", ".", ...