zuoye5.java

继承和重载java 的实验报告和代码（全）

import java.awt.*;
import java.awt.event.*;
import java.lang.String.*;
class Father
{
	String sname;
	float height,weight;
    Father(String sname)
	{
		this.sname=sname;
		}
	public String getName()
	{
		return sname;
		}
	public String speak(String s)
	{
		String talk=new String(s);
		return talk;
		}
	}
class Son extends Father
{
	public Son(String s)
	{
		super(s);
		}
	}//继承

class ChengChe
{
	String s1,s2,s3;
	int a;
    ChengChe()
	{
		s1=new String("我骑自行车去天安门。");
		}
	ChengChe(String s)
	{
		this.s2=s;
		}
	ChengChe(int i,String s)
	{
        a=i;
        s3=s;
		}
	}//重写

class SuperClass
{
    String str,str1,str2;
    int i;
    SuperClass(String str)
    {
       this.str=str;

       }
}

class SubClass
{
    String str,str1,str2;
    int i;
    SubClass(String str1)
	{
		this.str1=str1;
	}
    SubClass(int i,String str2)
	{
		this.i=i;
		this.str2=str2;
	}
}//构造函数


class Windows extends Frame implements ActionListener
{
	Button button1,button2,button3,button4;
	TextArea area;Label lab;
	Windows(String s)
	{
		super(s);
		setLayout(new FlowLayout());
		lab=new Label("操作选择:",Label.CENTER);
		lab.setBackground(new Color(0,250,250));
		button1=new Button("继承");
		button1.setBackground(Color.blue);
		button1.setForeground(Color.cyan);
		button1.addActionListener(this);
		button2=new Button("重载");
		button2.setBackground(Color.blue);
		button2.setForeground(Color.cyan);
		button2.addActionListener(this);
		button3=new Button("构造函数的继承与重载");
		button3.setBackground(Color.blue);
		button3.setForeground(Color.cyan);
		button3.addActionListener(this);
		add(lab);
		add(button1);
		add(button2);
		add(button3);
		area=new TextArea();
		add(area);
		button4=new Button("关闭");
		button4.setBackground(Color.red);
		button4.setForeground(Color.yellow);
		add(button4);
		button4.addActionListener(this);
		setBounds(100,100,500,500);
		setVisible(true);
		validate();
	}
		public void actionPerformed(ActionEvent e)
		{
			if(e.getSource()==button1)
			{
				area.setText(null);
				area.setFont(new Font("黑体",Font.BOLD,15));
				area.setBackground(new Color(151,80,50));
				Father father=new Father("Father");
				Son son=new Son("son");
				father.height=180.0f;
				father.weight=160f;
				son.height=160.0f;
				son.weight=120.0f;
				area.append(""+father.speak("I'm father..")+"\n");
				area.append("\nMy height is "+father.height+" and my weight is"+father.weight+"\n");
				area.append("\n"+son.speak("I'm son..")+"\n");
				area.append("\nMy height is "+son.height+" and my weight is"+son.weight+"\n");
				}
			else if(e.getSource()==button2)
			{
				area.setText(null);
				area.setFont(new Font("楷书",Font.ITALIC,15));
				area.setBackground(new Color(50,180,100));
				ChengChe 乘车1=new ChengChe();
				area.append(乘车1.s1+"\n");
				ChengChe 乘车2=new ChengChe("摩托车");
				area.append("\n我骑"+乘车2.s2+"去天安门。\n");
				ChengChe 乘车3=new ChengChe(8,"乘公交车");
				area.append("\n我早上"+乘车3.a+"点"+乘车3.s3+"去天安门。\n");
				}
			else if(e.getSource()==button3)
			{

			    area.setText(null);
			    area.setFont(new Font("幼圆",Font.ROMAN_BASELINE,15));
			    area.setBackground(new Color(46,100,250));
			    SuperClass sup=new SuperClass("我是父类构造函数。");
			    area.append(sup.str+"\n");
			    SubClass sub1=new SubClass("我是子类的第一个构造函数。");
			    area.append("\n"+sub1.str1+"\n");
			    SubClass sub2=new SubClass(1,"我是子类的第二个构造函数。");
			    area.append("\n"+sub2.str2);
				}
			else if(e.getSource()==button4)
			{
				System.exit(0);
				}
			}
		}
public class zuoye5
{
	public static void main(String args[])
	{
		Windows win=new Windows("第五次Java实验");
		}
	}