Question

JAVA

A. Create a class to hold information about subcontractors and allow that information to be read and changed.

B. Create a class to hold information about contracts and allow that information to be read and changed. Everything except the list of subcontractors should be included at this item.

C. Create a class to hold information about contracts and allow that information to be read and changed. Only the list of subcontractors should be included at this item.

Answer 1

implemented following classes:

Subcontractor: to store individual Subcontractor details.

Subcontractors: to store list of Subcontractor

Contract: to store individual Contract

Contracts: to store list of Contracts.

SubContractor.java

package Examples;

public class SubContractor {

String name;

String id;

SubContractor(String name,String id){

this.name= name;

this.id = id;

}

public void setName(String name) {

this.name = name;

}

public void setId(String id ) {

this.id = id;

}

public String getName() {

return this.name;

}

public String getId() {

return this.id;

}

}

Subcontractors.java

package Examples;

import java.util.*;

public class SubContractors {

public static void main(String[] args) {

// TODO Auto-generated method stub

List<SubContractor> sublist = new ArrayList<SubContractor>();

SubContractor sc1 =new SubContractor("john","a121");

SubContractor sc2 =new SubContractor("chris","a122");

SubContractor sc3 =new SubContractor("rosey","a123");

sublist.add(sc1);

sublist.add(sc2);

sublist.add(sc3);

for(SubContractor scs:sublist) {

System.out.println(scs.getName()+" "+scs.getId()+" ");

}

}

}

Contract.java

package Examples;

public class Contract {

String id,description,name;

Contract(String id,String description,String name){

this.id = id;

this.description = description;

this.name = name;

}

public void setId(String id) {

this.id = id;

}

public void setDescription(String description) {

this.description = description;

}

public void setName(String name)

{

this.name = name;

}

public String getName() {

return this.name;

}

public String getId() {

return this.id;

}

public String getDescription() {

return this.description;

}

}

Contracts.java

package Examples;

import java.util.ArrayList;

import java.util.List;

public class Contracts {

public static void main(String[] args) {

// TODO Auto-generated method stub

List<Contract> clist = new ArrayList<Contract>();

Contract cs1 = new Contract("c111","emai service for plug in ","email service");

Contract cs2 = new Contract("c112","tel service for plug in ","tele service");

clist.add(cs1);

clist.add(cs2);

for(Contract css: clist) {

System.out.println(css.id+" "+css.description+" "+css.name);

}

List<SubContractor> sublist = new ArrayList<SubContractor>();

SubContractor sc1 =new SubContractor("john","a121");

SubContractor sc2 =new SubContractor("chris","a122");

SubContractor sc3 =new SubContractor("rosey","a123");

sublist.add(sc1);

sublist.add(sc2);

sublist.add(sc3);

for(SubContractor scs:sublist) {

System.out.println(scs.getName()+" "+scs.getId()+" ");

}

}

}

output for Subcontractors.java execution:

john a121

chris a122

rosey a123

output for Contracts.java

c111 emai service for plug in email service

c112 tel service for plug in tele service

john a121

chris a122

rosey a123

comments:

the above code is executable one with output screenshots.

please comment me if any queries...thanks