We want to connect the people who have knowledge to the people who need it, to bring together people with different perspectives so they can understand each other better, and to empower everyone to share their knowledge.
public class User { public String name; public String password; }
public class User { private String name; private String password; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
public void setPassword(String password) { if (password == null) { throw new IllegalArgumentException("invalid password"); } this.password = password; }
class Admin extends User { @Override public void setName(String name) { super.setName(name + "Admin"); } }
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