摘要：
下面通过例子看看：一. keySet()方式。 Map<String, String> map = new HashMap<String, String>(); map.put("01", "zhangsan"); map.put("02", "lisi"); map.put("03", "wang 阅读全文
摘要：
public class MainFrame extends JFrame { private JButton printButton = new JButton("打印"); private JButton suspendButton = new JButton("暂停"); private JLabel printText = new JLabel("模拟小票打印... 阅读全文