Inheritance 跟踪执行和继承java
我是Java新手。如何跟踪此程序的执行?这个程序是正确地传递继承,还是仅仅传递一个没有继承的普通封装 我只是想知道我是否真的在这些类中传递了继承。非常感谢您的回复 这是第一个类,Inheritance 跟踪执行和继承java,inheritance,encapsulation,trace,Inheritance,Encapsulation,Trace,我是Java新手。如何跟踪此程序的执行?这个程序是正确地传递继承,还是仅仅传递一个没有继承的普通封装 我只是想知道我是否真的在这些类中传递了继承。非常感谢您的回复 这是第一个类,TestMembers: public class TestMembers { public static void main (String args []){ Members Ailee=new Members("Ailee","52213116028","BRS",2,1.6,45);
TestMembers
:
public class TestMembers {
public static void main (String args []){
Members Ailee=new Members("Ailee","52213116028","BRS",2,1.6,45);
Members Amy=new Members("Amy","52213116032","BDR",2,1.63,57);
Members Jack=new Members("Jack","52213116201","BRE",2,1.75,82);
String[] member = { "Ailee","Amy", "Jack"};
JFrame frame = new JFrame();
String teammembers = (String) JOptionPane.showInputDialog(frame, "Team
Members","Team members",
JOptionPane.QUESTION_MESSAGE,null,member, member[0]);
if (teammembers==member[0]){
JOptionPane.showMessageDialog(null,Ailee,"Member Profile",
JOptionPane.INFORMATION_MESSAGE);
} else if (teammembers==member[1]){
JOptionPane.showMessageDialog(null,Amy,"Member Profile",
JOptionPane.INFORMATION_MESSAGE);
} else if (teammembers==member[2]){
JOptionPane.showMessageDialog(null,Jack,"Member Profile",
JOptionPane.INFORMATION_MESSAGE);
}
System.exit(0);
}
}
public class Members extends Student{
private double bmi;
private String bmistatus;
public Members(String name,String id_number, String course, int semester,
double height, double weight){
setPersonname(name);
setStudentIdNumber(id_number);
setStudentCourse(course);
setStudentSemester(semester);
setPersonHeight(height);
setPersonWeight(weight);
}
public double getMemberBMI(){
bmi= getPersonWeight()/(getPersonHeight()*getPersonHeight());
DecimalFormat twoDForm = new DecimalFormat("#.00");
return Double.valueOf(twoDForm.format(bmi));
}
public String BMIstatus(){
if (bmi>= 18.5 & bmi <= 25.0){
return bmistatus= "Optimal weight";
} else if (bmi<18.5){
return bmistatus="Underweight";
} else if (bmi>25.0){
return bmistatus="Overweight";
}
return bmistatus;
}
public String toString() {
return "Name: " + getPersonname() + "\nID: " + getStudentIdNumber()
+"\nCourse:
" + getStudentCourse()+
"\nSem: " + getStudentSemester()+"\nHeight: "+getPersonHeight()+" metre"+
"\nWeight: "+getPersonWeight()+" kg"+"\nBMI:"+getMemberBMI()+"\nBMI status
:"+BMIstatus();
}
}
这是另一个类,Person
:
public class Person {
private String name;
private double height;
private double weight;
public void setPersonname(String name){
this.name=name;
}
public String getPersonname(){
return name;
}
public void setPersonHeight(double height){
this.height=height;
}
public double getPersonHeight(){
return height;
}
public void setPersonWeight(double weight){
this.weight=weight;
}
public double getPersonWeight(){
return weight;
}
}
这是第三节课,学生
:
public class Student extends Person{
private String id_number;
private String course;
private int semester;
public void setStudentIdNumber(String id_number){
this.id_number=id_number;
}
public String getStudentIdNumber(){
return id_number;
}
public void setStudentCourse(String course){
this.course=course;
}
public String getStudentCourse(){
return course;
}
public void setStudentSemester(int semester){
this.semester=semester;
}
public int getStudentSemester(){
return semester;
}
}
这是第四节课,成员
:
public class TestMembers {
public static void main (String args []){
Members Ailee=new Members("Ailee","52213116028","BRS",2,1.6,45);
Members Amy=new Members("Amy","52213116032","BDR",2,1.63,57);
Members Jack=new Members("Jack","52213116201","BRE",2,1.75,82);
String[] member = { "Ailee","Amy", "Jack"};
JFrame frame = new JFrame();
String teammembers = (String) JOptionPane.showInputDialog(frame, "Team
Members","Team members",
JOptionPane.QUESTION_MESSAGE,null,member, member[0]);
if (teammembers==member[0]){
JOptionPane.showMessageDialog(null,Ailee,"Member Profile",
JOptionPane.INFORMATION_MESSAGE);
} else if (teammembers==member[1]){
JOptionPane.showMessageDialog(null,Amy,"Member Profile",
JOptionPane.INFORMATION_MESSAGE);
} else if (teammembers==member[2]){
JOptionPane.showMessageDialog(null,Jack,"Member Profile",
JOptionPane.INFORMATION_MESSAGE);
}
System.exit(0);
}
}
public class Members extends Student{
private double bmi;
private String bmistatus;
public Members(String name,String id_number, String course, int semester,
double height, double weight){
setPersonname(name);
setStudentIdNumber(id_number);
setStudentCourse(course);
setStudentSemester(semester);
setPersonHeight(height);
setPersonWeight(weight);
}
public double getMemberBMI(){
bmi= getPersonWeight()/(getPersonHeight()*getPersonHeight());
DecimalFormat twoDForm = new DecimalFormat("#.00");
return Double.valueOf(twoDForm.format(bmi));
}
public String BMIstatus(){
if (bmi>= 18.5 & bmi <= 25.0){
return bmistatus= "Optimal weight";
} else if (bmi<18.5){
return bmistatus="Underweight";
} else if (bmi>25.0){
return bmistatus="Overweight";
}
return bmistatus;
}
public String toString() {
return "Name: " + getPersonname() + "\nID: " + getStudentIdNumber()
+"\nCourse:
" + getStudentCourse()+
"\nSem: " + getStudentSemester()+"\nHeight: "+getPersonHeight()+" metre"+
"\nWeight: "+getPersonWeight()+" kg"+"\nBMI:"+getMemberBMI()+"\nBMI status
:"+BMIstatus();
}
}
公共类成员扩展了学生{
私人双bmi;
私有字符串状态;
公共成员(字符串名称、字符串id_编号、字符串课程、整数学期、,
双高,双重){
setPersonname(名称);
设置学生编号(id_编号);
设置学生课程(课程);
设置学生学期(学期);
设置人员高度(高度);
设定个人体重(重量);
}
公共双getMemberBMI(){
bmi=getPersonWeight()/(getPersonHeight()*getPersonHeight());
DecimalFormat twoDForm=新的DecimalFormat(“#.00”);
返回Double.valueOf(twoDForm.format(bmi));
}
公共字符串状态(){
如果(bmi>=18.5&bmi我认为,继承在语法上是正确的。从设计的角度来看,它取决于更广泛的上下文
关于软件设计,没有简单的学习方法。你可能想阅读关于或(按此顺序)的书籍。它们会教你很多基本规则。但是,你也需要从日常工作中学习,这样你就可以学习如何应用这些规则
关于跟踪,您可以使用记录器
,也可以简单地使用系统输出
,例如:
private static final Logger logger = Logger.getInstance(TestMembers.class);
...
if (teammembers==member[0]) {
logger.debug("first member");
}
...
此外,我建议删除尾随的System.exit(0)
;还有其他方法可以做到这一点。在类内部和类之间添加了格式