Java第四次作业

第一题:

package java_1104;

public class Grade{
int number;
String name;
Grade(){ //
number=57;
name="java";
}
Grade(int x,String y){
number=x;
name=y;
}
public void showNumber(){
System.out.println(number);
}
public void showName(){
System.out.println(name);
}
}

第二题:

package java_1104;

public class Student{
int number;
int ID;
String name;
int age;
String sex;
String address;
long tel;
String email;
Student(){
number=11;
ID=57;
name="Gt";
age=21;
sex="man";
address="Changchun";
tel=0351677;
email="3543579666@jlu.com";
}
Student(int xnumber,int xID,String xname,int xage,String xsex,String xaddress,long xtel,String xemail){
number=xnumber;
ID=xID;
name=xname;
age=xage;
sex=xsex;
address=xaddress;
tel=xtel;
email=xemail;
}
public void show_Message(){
System.out.println(number);
System.out.println(ID);
System.out.println(name);
System.out.println(age);
System.out.println(sex);
System.out.println(address);
System.out.println(tel);
System.out.println(email);
}
}

第三题:

package java_1104;

public class Fruit {
String name;
int count;
double price;
Fruit(){
}
public void showName(){
System.out.println(name);
}
public void showCount(){
System.out.println(count);
}
public void showPrice(){
System.out.println(price);
}
}
第四题:

package java_1104;

public class Box {
int height;
int width;
int length;
Box(int a, int b,int c){
height=a;
width=b;
length=c;
}
public void cal_V(){
System.out.println("体积是"+height*width*length);
}
public static void main(String[] args) {
Box q=new Box(1,2,3);
Box w=new Box(2,4,7);
Box e=new Box(5,7,10);
q.cal_V();
w.cal_V();
e.cal_V();
}
}



以上是第四次作业