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javacdata-structures

Creating struct like data structure in Java


I am new to Java and I am trying to find out a way to store information like a struct in C. Say for example I want to have a program hire employees. It would take from the user a first name, last name, and id number and would store it. The user could then view that information based off a condition (if the database had more than 1 employee for example). Can any suggest the best way for doing this?


Solution

  • A struct in C just like a class in Java and much more powerful, because class in Java can contain method, and C++ does. You create a new class. For example :

       class Employee {
           private String name;
           private int code;
    
       // constructor
       public Employee(String name, int code) {
          this.name = name;
          this.code = code;
       }
    
           // getter
           public String getName() { return name; }
           public int getCode() { return code; }
           // setter
    
           public void setName(String name) { this.name = name; }
           public void setCode(int code) { this.code = code; }
        }
    

    And when you want to create multi employees, create array just like in C:

    Employee[] arr = new Employee[100];  // new stands for create an array object
    arr[0] = new Employee("Peter", 100); // new stands for create an employee object
    arr[1] = new Employee("Mary", 90);