Java —— 有关存储学生信息数组的操作

来源：互联网发布：wsdl怎么生成java代码编辑：程序博客网时间：2024/05/17 03:02
//class Testpublic class Test {        public static void main(String[] args) {          // TODO Auto-generated method stub          Student s;          s = new Student("Beyond",2000272823);          System.out.println(s.toString());          System.out.println();          StudentsManagement p = new StudentsManagement();          System.out.println("The none List is: ");          p.printStudentsInfo();          p.addAnewStudent("Beyond",2001232625);          p.addAnewStudent("TopC",2001232625);          p.addAnewStudent("Sam",2000272823);        System.out.println("The "+p.getNbStudents()+" objects of List is:");          p.printStudentsInfo();          System.out.println("After remove the List is :");          p.removeAStudent(2001232625);          p.printStudentsInfo();            }  }  // class StudentsManagementpublic class StudentsManagement {        private Student[] students;      private int nbStudents;            public StudentsManagement(){          nbStudents = 0;          students = new Student[100];      }      public void addAnewStudent(String name,int number){          Student s = new Student(name,number);         int index = searchAstudent(number);        if(index >= 0){                System.out.println("A student already has this student number: "        +number);        }        else{        students[nbStudents] = s;          ++ nbStudents;         }    }          public void removeAStudent(int number){                  // The operator of remove    int index = searchAstudent(number);        if(index == nbStudents-1){              nbStudents --;        }        else if(index < nbStudents - 1){              for(int i = index; i<nbStudents-1; i++){                  students[i] = students[i+1];              }              nbStudents --;          }      }             // Search the Student whose number is number    public int searchAstudent(int number){        int index = -1;          for(int i = 0; i<nbStudents; i++){              if(students[i].getNumber() == number){  //              Student d = students[i];  //              students.remove(d);  //              students[i] = null;                  index = i;                  break;              }          }          return index;    }                  public void printStudentsInfo(){          if(nbStudents == 0) return ;          for(int i = 0; i<nbStudents; i++){              System.out.println(students[i]);          }          System.out.println();      }            public int getNbStudents() {          return nbStudents;      }      public void setNbStudents(int nbStudents) {          this.nbStudents = nbStudents;      }        }  //class Studentpublic class Student extends Person{            private int number;            //Default constructor      public Student(){          System.out.println("I am subclass constructor.");      }            public Student(String name,int number){  //      super.setName(name);          super(name);          this.number = number;                }      public String toString(){          return "The name of this student is: "+super.getName()+".       And the number is: "+number;      }      //Accessor methods (get/set)      public int getNumber() {          return number;      }        public void setNumber(int number) {          this.number = number;      }  }  //class Personpublic class Person {        private String name;            //Default constructor      public Person(){          System.out.println("I am the superclass constructor.");      }            public Person(String name){          this.name = name;      }      //Accessor methods (get/set)      public String getName() {          return name;      }        public void setName(String name) {          this.name = name;      }  }
0 0