// 收发文管理类
public class DocumentManagement {
private String sender;
private String receiver;
private String content;
public DocumentManagement(String sender, String receiver, String content) {
this.sender = sender;
this.receiver = receiver;
this.content = content;
}
public void sendDocument() {
System.out.println("发送文档：" + content + "，从 " + sender + " 到 " + receiver);
}
}
]]>
public class ApprovalDocument extends DocumentManagement {
private boolean isApproved;
public ApprovalDocument(String sender, String receiver, String content) {
super(sender, receiver, content);
this.isApproved = false;
}
public void approveDocument() {
this.isApproved = true;
System.out.println("文档已批准！");
}
}
]]>