共5道大题 最后一题为自动洗牌发牌系统
1) 编写一个类实现银行帐户的概念。包括的属性有：帐号、储户姓名、地址、存款余额，包括的方法有：存款、取款、查询、计算利息、累加利息等。
public class bank {
private int id;
private String name;
private String address;
private double money;
public bank()
{
this.id = 0;
this.name = "默认姓名";
this.address = "默认地址";
this.money = 0;
}
public String toString() {
return "bank [id=" + id + ", name=" + name + ", address=" + address + ", money=" + money + "]";
}
public bank(int id, String name, String address, int money) {
super();
this.id = id;
this.name = name;
this.address = address;
this.money = money;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public double getMoney() {
return money;
}
public void setMoney(double money) {
this.money = money;
}
/**
* 存款
*/
public void saving(int m,int y) {
double a=getMoney();
double tax=y*0.001*m;
setMoney(getMoney()+m+tax);
System.out.println("存款成功:"+a+"元 "+y+"年后--->"+getMoney()+"元");
}
/**
* 取款
*/
public void take(int m)
{
double a=getMoney();
if(getMoney()<0)
{
System.out.println("余额不足取款失败");
}
setMoney(getMoney()-m);
System.out.println("取款成功:"+a+"元--->"+getMoney()+"元");
}
}2）编写一个类实现桌子的概念，包括的属性有长、宽、高和颜色，包括的方法有：计算体积、显示桌子信息、设置桌子颜色及长宽高。
public class desk {
private double length;
private double width;
private double height;
private String color;
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public double getLength() {
return length;
}
public void setLength(double length) {
this.length = length;
}
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public desk(double length, double width, double height, String color) {
super();
this.length = length;
this.width = width;
this.height = height;
this.color = color;
}
public double V() {
return length*height*width;
}
@Override
public String toString() {
return "desk [length=" + length + ", width=" + width + ", height=" + height +", volume="+V()+ "]";
}
}3）编写一个类实现一个圆，属性包括圆心、半径，方法主要包括显示的圆的信息、求面积等。圆心是Point类的对象，有两个属性x,y，代表横纵坐标。
public class circle {
private double r;
private double x;
private double y;
public double getR() {
return r;
}
public void setR(double r) {
this.r = r;
}
publ4ic double getX() {
return x;
}
public void setX(double x) {
this.x = x;
}
public double getY() {
return y;
}
public void setY(double y) {
this.y = y;
}
public circle(point p, double r) {
this.r = r;
this.x = p.getX();
this.y = p.getY();
}
public double area() {
return (double)((int)(Math.PI*Math.pow(r, 2)*100))/100; //保留两位小数
}
@Override
public String toString() {
return "circle [r=" + r + ", x=" + x + ", y=" + y + ", area=" + area() + "]";
}
}
圆心类
public class point {
private int x;
private int y;
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
public point(int x, int y) {
this.x = x;
this.y = y;
}
public point() {
this.x=0;
this.y=0;
}
}4)设计一个扑克洗牌算法。将52张牌（不包括大、小王）用对象的形式表示，每张牌包括花色和大小。大小按如下序号排列：（2、3、4、5、6、7、8、9、10、J、Q、K、A）， 花色为： ♠ 、♣、♥、♦ ，首先将扑克按顺序存放到一个一维数组中，然后按洗牌算法进行洗牌,最后，按东、南、西、北进行分发，显示扑克时将同一花色放在一起。
card类
public class card {
private String color;
private String num;
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public String getNum() {
return num;
}
public void setNum(String num) {
this.num = num;
}
@Override
public String toString() {
return "\t"+color+"-"+num;
}
}具体算法代码：建牌库，洗牌，理牌
public class cards_test {
public static void main(String[] args) {
final int N=52,M=13;
card[] cards=new card[N];
card[] East=new card[M];
card[] West=new card[M];
card[] North=new card[M];
card[] South=new card[M];
for(int i=0;i<M;i++)
East[i]=new card();
for(int i=0;i<M;i++)
South[i]=new card();
for(int i=0;i<M;i++)
West[i]=new card();
for(int i=0;i<M;i++)
North[i]=new card();
String[] color= {"红桃","草花","红心","方片"};
String[] num= {"A","2","3","4","5","6","7","8","9","10","J","Q","K"};
for(int i=0;i<N;i++) {
cards[i]=new card();
cards[i].setNum(num[i%13]);
cards[i].setColor(color[i/13]);
}
System.out.println("洗牌前");
for(int i=0;i<N;i++) {
System.out.print(cards[i].toString());
if((i+1)%13==0)
System.out.println();
}
for(int i=0;i<N;i++) {
int index=(int)(Math.random()*10000)%52;
String temp=cards[i].getNum();
cards[i].setNum(cards[index].getNum());
cards[index].setNum(temp);
String co=cards[i].getColor();
cards[i].setColor(cards[index].getColor());
cards[index].setColor(co);
}
System.out.println("洗牌后");
String[] position= {"东:","西:","南:","北:"};
for(int i=0;i<N;i++) {
if(i%13==0)
System.out.print(position[i/13]);
if(i>=0&&i<=12)
East[i]=cards[i];
else if(i>=13&&i<=25)
South[i-13]=cards[i];
else if(i>=26&&i<=38)
West[i-26]=cards[i];
else
North[i-39]=cards[i];
System.out.print(cards[i].toString());
if((i+1)%13==0)
System.out.println();
}
System.out.print("理牌后（相同花色放一起）");
System.out.print("\n"+position[0]);
for(int j=0;j<4;j++)
for(int i=0;i<M;i++)
if(East[i].getColor().equals(color[j]))
System.out.print(East[i].toString());
System.out.print("\n"+position[1]);
for(int j=0;j<4;j++)
for(int i=0;i<M;i++)
if(West[i].getColor().equals(color[j]))
System.out.print(West[i].toString());
System.out.print("\n"+position[2]);
for(int j=0;j<4;j++)
for(int i=0;i<M;i++)
if(South[i].getColor().equals(color[j]))
System.out.print(South[i].toString());
System.out.print("\n"+position[3]);
for(int j=0;j<4;j++)
for(int i=0;i<M;i++)
if(North[i].getColor().equals(color[j]))
System.out.print(North[i].toString());
}
}