defineclasses.java

对于定义一个类初学者有所参考

import java.applet.Applet;
import java.awt.*;

public class DefineClasses extends Applet
{
	Label prompt1,prompt2;
	TextField inputNo1,inputNo2,inputName1,inputName2;
	Department MyDept1,MyDept2;

	public void init()
	{
		prompt1=new Label("请输入两个部门的编号:");
		inputNo1=new TextField(5);
        inputNo2=new TextField(5);
		prompt2=new Label("请输入两个部门的名称:");
		inputName1=new TextField(5);
		inputName2=new TextField(5);
		add(prompt1);
		add(inputNo1);
		add(inputNo2);
		add(prompt2);
		add(inputName1);
		add(inputName2);

		MyDept1=new Department();
		MyDept2=new Department();
	}
	public void paint(Graphics g)
	{
		g.drawString(MyDept1.toString(),20,100);
		g.drawString(MyDept2.toString(),20,120);
	}
	
	public boolean action(Event e,Object o)
	{
		if (e.target==inputNo1)
			MyDept1.setDeptNo(Integer.parseInt(inputNo1.getText()));
		else if (e.target==inputNo2)
			MyDept2.setDeptNo(Integer.parseInt(inputNo2.getText()));
		else if (e.target==inputName1)
			MyDept1.m_DeptName=new String(inputName1.getText());
		else if (e.target==inputName2)
			MyDept2.m_DeptName=new String(inputName2.getText());
		repaint();
		return true;
	}
}


class Department
{
	int m_DeptNo=10;
	String m_DeptName;
	int m_DeptTotalEmp=30;

	int getDeptNo()
	{
		return m_DeptNo;
	}

	boolean setDeptNo(int newno)
	{
		if (newno>0)
		{
			m_DeptNo=newno;
			return true;
		}
		else 
			return false;
	}

	boolean isSameDept(Department d)
	{
		if (getDeptNo()==d.getDeptNo())
			return true;
		else
			return false;
	}

	public String toString()
	{
		return ("部门编号:"+getDeptNo()+";"+"部门名称:"+m_DeptName+"；"+"本部门共有"+m_DeptTotalEmp+"名成员");
	}
}