Help with class

Question

hello, I am having trouble with the following code I get the following errors. I have no idea how to fix this, if anyone could help I would greatly appriciate it.
StudentAddress.java:12: StudentAddress(java.lang.String) is already defined in StudentAddress
public StudentAddress(String city){
^
StudentAddress.java:16: StudentAddress(java.lang.String) is already defined in StudentAddress
public StudentAddress(String state){
^
StudentAddress.java:24: StudentAddress(int) is already defined in StudentAddress
public StudentAddress(int zipCode){
//Data represents GPA/hours
public class StudentAddress {
     //Declare Variables
     private String streetAddress, city, state;
     private int addressNumber, zipCode;
     public StudentAddress(String streetAddress){
          this.streetAddress = streetAddress;
     public StudentAddress(String city){
          this.city = city;     
     public StudentAddress(String state){
          this.state = state;
     public StudentAddress(int addressNumber){
          this.addressNumber = addressNumber;
     public StudentAddress(int zipCode){
          this.zipCode = zipCode;
          //this will return a string representation of this object so that
          //we can print it to the console easily
     public String toString(){
          return streetAddress + "\n" + "#" +addressNumber +"\n" + city + "," + state + zipCode;
}

Answer 1

when you create an instance of StudentAddress class, you will either pass a String or an int irrespective of whether it is city, state, streetAddress, addressNumber or zipCode. Suppose you create an instance of StudentAddress by passing a string, which constructor it will invoke? The JVM will get confused on which constructor to invoke since it has three constructors with the same String as the parameter type. What you have written is not 'Constructor Overloading'. Read some tutorial about constructors and constructor overloading and try coding.
You can write this class as follows, Assuming that it will fulfill your requirement
public class StudentAddress {
     //Declare Variables
     private String streetAddress, city, state;
     private int addressNumber, zipCode;
     public StudentAddress(String streetAddress,String city,String state,int addressNumber,int zipCode){
          this.streetAddress = streetAddress;
                                this.city = city;
                                this.state = state;
                                this.addressNumber = addressNumber;
                                this.zipCode = zipCode;
                              //this will return a string representation of this object so that
          //we can print it to the console easily
     public String toString(){
          return streetAddress + "\n" + "#" +addressNumber +"\n" + city + "," + state + zipCode;
}you can also try this website
http://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Java/Chapter03/constructors.html
All the best. Have a Nice Day.