1.长方体
class Box{
int length,width,high;
void setBox(int l,int w,int h){
length=l;
width=w;
high=h;
}
int volume(){
int v;
v=length*width*high;
return v;
}
}
public class cft {
public static void main(String args[]){
int vi;
Box as;
as=new Box();
as.setBox(1,2,3);
vi=as.volume();
System.out.println("体积为："+vi);
}
}
2.银行账户
class BankAccount{
double leftmoney;
int account_number;
public void savemoney(double money) { //存款
leftmoney+=money;
}
public void getmoney (double money){ //取款
leftmoney-=money;
}
public double getleftmoney () { //查询余额
return leftmoney;
}
public BankAccount (int number, double money){ //构造方法，用来初始化变量
account_number=number;
leftmoney=money;
}
}
public class java3_2 {
public static void main(String[] args) {
BankAccount ba;
ba=new BankAccount(123456,500);
ba.savemoney(1000);
System.out.println("存入1000元后，您的余额为："+ba.getleftmoney());
ba.getmoney(2000);
System.out.println("取款2000元后，您的余额为："+ba.getleftmoney());
}
}
