声明Friend类，表示朋友的姓名、性别、电话号码关系等信息用java写

public class Friend {
private String name;
private String gender;
private String phoneNumber;
private String relationship;

public Friend(String name, String gender, String phoneNumber, String relationship) {
this.name = name;
this.gender = gender;
this.phoneNumber = phoneNumber;
this.relationship = relationship;
}

public String getName() {
return name;
}

public String getGender() {
return gender;
}

public String getPhoneNumber() {
return phoneNumber;
}

public String getRelationship() {
return relationship;
}

public void setName(String name) {
this.name = name;
}

public void setGender(String gender) {
this.gender = gender;
}

public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}

public void setRelationship(String relationship) {
this.relationship = relationship;
}
}