customer.java

this is a trade sale system realized by java. It can run some easy functions and has a good design p

package trader;
import java.io.Serializable;
public class Customer implements Serializable{
  private String id;
  private String name;
  private String addr;

  // Constructors
  public Customer(String id, String name, String addr){
    this.id = id;
    this.name = name;
    this.addr = addr;
  }

  public Customer(String id){
    this (id, null, null);
  }

  public Customer(){
    this (null, null, null);
  }

  // Accesser methods
  public String getId(){
    return id;
  }

  public String getName(){
    return name;
  }

  public String getAddr(){
    return addr;
  }

  // Mutator methods - note you cannot change the id
  public void setName(String newName){
    name = newName;
  }

  public void setAddr(String newAddr){
    addr = newAddr;
  }

  public String toString() {
    return "Customer:  " + id + "  " + name + "  " + addr;
  }
}