Primitive obsession is a code smell where primitive data types are used excessively instead of creating custom objects. Here is an example of code with primitive obsession in Java:

public class Customer { private String name; private int age; private String address; private String email; private String phone;

public Customer(String name, int age, String address, String email, String phone) {
    this.name = name;
    this.age = age;
    this.address = address;
    this.email = email;
    this.phone = phone;
}

public String getName() {
    return name;
}

public int getAge() {
    return age;
}

public String getAddress() {
    return address;
}

public String getEmail() {
    return email;
}

public String getPhone() {
    return phone;
}

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

public void setAge(int age) {
    this.age = age;
}

public void setAddress(String address) {
    this.address = address;
}

public void setEmail(String email) {
    this.email = email;
}

public void setPhone(String phone) {
    this.phone = phone;
} }

In this example, the Customer class has five fields, all of which are primitive data types or strings. This can lead to code duplication and difficulty in maintaining the code. A better approach would be to create custom objects for the address, email, and phone fields, which would make the code more readable and maintainable.