java程序设计(辛运帏_饶一梅_马素霞_第二版)课后习题答案.doc

第二章 习题2.2 import java.util.*; class MyDate{ private int year; private int month; private int day; public MyDate(int y,int m,int d){//构造函数，构造方法 year=y; month=m; day=d; }//end public MyDate(int y,int m,int d) public int getYear(){//返回年 return year; }//end getYear() public int getMonth(){//返回月 return month; }//end getMonth() public int getDay(){//返回日 return day; }//end getDay() }//end class MyDate class Employee{ private String name; private double salary; private MyDate hireDay; public Employee(String n,double s,MyDate d){ name=n; salary=s; hireDay=d; }//end public Employee(String n,double s,MyDate d) public void print(){ System.out.println(名字:+name+\n工资:+salary+\n雇佣年份:+hireYear()+\n); }//end print() public void raiseSalary(double byPercent){ salary*=1+byPercent/100; }//end public int hireYear(){ return hireDay.getYear(); } }//end class Employee public class MyTestClass { public static void main(String[] args) { Employee[]staff=new Employee[3]; staff[0]=new Employee(Harry Hacker,35000,new MyDate(1989,10,1)); staff[1]=new Employee(Carl Carcker,75000,new MyDate(1987,12,15)); staff[2]=new Employee(Tony Tester,38000,new MyDate(1990,3,12)); int integerValue; System.out.println(The information of employee are:); for(integerValue=0;integerValue=2;integerValue++){ staff[integerValue].raiseSalary(5); }//end for() for(integerValue=0;integerValue=2;integerValue++){ staff[integerValue].print(); }//end for() }//end main() }//end class MyTestClass //习题2.4 import java.util.*; public class DataType { public static void main(String[] args) { boolean flag; char yesChar; byte finByte; int intValue; long longValue; short shortValue; float floatValue; double doubleValue; flag=true; yesChar=y; finByte=30; intValue=-7000; longValue=200l; shortValue=2