java语言程序设计基础篇编程练习题7~10章

{
return students;
}
public int getNumberOfStudents()
{
return numberOfStudents;
}
public String getName()
{
return name;
}
}*/
//7.11
/*
class MyPoint
}
}
public class LQ
{
public static void main(String []args)
{
MyPoint M1=new MyPoint(0,0);
MyPoint M2=new MyPoint(10,30.5);
double d=M1.distance(M2);
{
return y;
}
double distance(double X,double Y)
{
return Math.sqrt((x-X)*(x-X)+(y-Y)*(y-Y));
}
double distance(MyPoint M)
{
return Math.sqrt((x-M.get1())*(x-M.get1())+(y-M.get2())*(y-M.get2()));
}
}
public class LQ
{
public static void main(String []args)
{
Time t1=new Time();
JOptionPane.showMessageDialog(null,t1.get1()+" : "+t1.get2()+" : "+t1.get3());
void set()
{
char c;
String s=JOptionPane.showInputDialog("请输入风扇的状态 Y(开) N(关)");
c=s.charAt(0);
if(c=='Y'||c=='y')
{
on=true;
//7.2
/*
import javax.swing.*;
class Fan
{
final static int SLOW=1;
final static int MEDIUM=2;
final static int FAST=3;
{
this.a=a;
}
void stor()
{
int j=2;
int n,c;
for(;a>2;)
{
if(a%j==0)
{
c=0;
for(n=2;n<j;n++)
{
if(j==2){c=0;}
else if(j%n==0){c=1;break;}
}
if(c==0)
}
}
*/
//7.7
/*
class Time
{
private int hour;
private int minute;
private int second;
Time()
{
Calendar c=Calendar.getInstance();
hour=c.get(c.HOUR);
hour=(int)(th%24);
}
int get1()
{
return hour;
}
int get2()
{
return minute;
}
int
get3()
{
return second;
}
}*/
//7.5
/*
import java.util.*;
public class LQ
{
public static void main(String []args)
{
GregorianCalendar g=new GregorianCalendar();
JOptionPane.showMessageDialog(null,g.YEAR+":"+g.MONTH+":"+g.DAY_OF_MONTH);
this.previousClosingPrice=previousClosingPrice;
}
void current()
{
double currentPrice=Double.parseDouble(JOptionPane.showInputDialog("请输入当前股票价格"));
radius=Double.parseDouble(s);
s=JOptionPane.showInputDialog("请输入风扇颜色");
color=s;
}
public String toString()
{
if(on==true)
{
String s="状态 "+on+" 半径 "+radius+" 风速 "+speed+" 颜色 "+color;
{
private double x;
private double y;
MyPoint()
{
x=0;y=0;
}
MyPoint(double x,double y)
{
this.x=x;
this.y=y;
}
double get1()
{
return x;
}
double get2()
return s;
}
else
{
String s="fan is off";
return s;
}
}
}
public class LQ
{
public static void main(String []args)
{
Fan f1 = new Fan();Fan f2 = new Fan();
{
Stock s=new Stock("20135","兴华");
JOptionPane.showMessageDialog(null,s.changePercent());
s.front();
s.current();
JOptionPane.showMessageDialog(null,s.changePercent());
f1.get();
f1.set();
System.out.println(f1.toString());
f2.get();
f2.set();
System.out.println(f2.toString());
}
}*/
//7.4
/*
import javax.swing.*;
{
this.symbol=symbol;
=name;
previousClosingPrice=4.5;
currentPrice=5.0;
}
void front()
{
double previousClosingPrice=Double.parseDouble(JOptionPane.showInputDialog("请输入前一天股票价格"));
class Stock
{
private String symbol;
private String name;
private double previousClosingPrice;
private double currentPrice;
Stock(String symbol,String name)
{
StackOfIntegers S=new StackOfIntegers(120);
S.stor();
}
}*/
//8.1
/*
public class LQ
{
public static void main(String []args)
{
String s=JOptionPane.showInputDialog("请输入一串字符");
System.out.println(on);
}
s=JOptionPane.showInputDialog("请输入风扇的速度(1,2,3)");
speed=Integer.parseInt(s);
s=JOptionPane.showInputDialog("请输入风扇半径");