ch4_e4_8.java

代码包括《Java语言与面向对象程序设计题解与实验指导》一书中 “习题解答”部分的所有程序的Java源代码和编译后生成的字节码或相应的HTML文件。 盘中的目录与书中的章节一致。

/* 4-8的补充例子*/
public class ch4_e4_8
{
public static void main(String args[])
{
Student demoStudent = new Student("008",892,'m',"张散",19);

System.out.println("学号：" + demoStudent.getStudentId());
System.out.println("班号：" + demoStudent.getClassId());
System.out.println("姓名：" + demoStudent.getStudentName());
System.out.println("性别：" 
+ ((demoStudent.getStudentGender() == 'm') ? "男" : "女"));
System.out.println("年龄：" + demoStudent.getStudentAge());
}
}

class Student
{
private String studentId;
private int classId;
private String studentName;
private char studentGender;
private int studentAge;

String getStudentId()
{
return studentId;
}

int getClassId()
{
return classId;
}

char getStudentGender()
{
return studentGender;
}

String getStudentName()
{
return studentName;
}

int getStudentAge()
{
return studentAge;
}

boolean setStudentAge(int newAge)
{
if( newAge>0 && newAge<130)
{
studentAge = newAge;
return true;
}
else
{
System.out.println("非法学生年龄！");
return false;
}
}

Student(String id, int clsId, char gender, String name, int age)
{
studentId = new String(id);
classId = clsId;
studentName = new String(name);
studentAge = age;
studentGender = gender;
}
}