In java
Problem: Using the ‘Name.java’ and ‘Student.java’ files, expand both classes to include the following methods:
A ‘copy’ constructor,
A ‘clone’ method,
A ‘finalize’ method,
A ‘dispose’ method, and
A ‘hashCode’ method.
A ‘compareTo’ method
Test the upgraded classes using the application ‘TestStudentName.java’ located in ‘Chapter01_Files.zip’. Be sure to include output messages in both the ‘finalize’ method and the ‘dispose’ method.
Chapter01 File 'TestStudentName.java' below.
// -----------------------------------------------
// TestStudentName.java
// -----------------------------------------------
public class TestStudentName
{
public static void main ( String [ ] args )
{
Name n1 = new Name ( "Ty", "Cobb" );
Name n2 = new Name ( "Babe", "Ruth" );
// ---- Test the copy constructor --------
System.out.println ( "Test the copy constructor ------------" );
Student s1 = new Student ( n1, "123456" );
Student s2 = new Student ( s1 );
s2.setStudent ( n2, "234567" );
if ( s1.equals ( s2 ) )
{
System.out.println ( "ttError - students should not be the same" );
System.out.println ( "tts1 = " + s1 );
System.out.println ( "tts1 = " + s2 );
}
else
{
System.out.println ( "ttSuccess - students are not the same" );
System.out.println ( "tts1 = " + s1 );
System.out.println ( "tts1 = " + s2 );
}
// ---- Test the clone method ------------
System.out.println ( "nnTest the 'clone' method ------------" );
Student s3 = (Student) s1.clone ( );
if ( s1.equals ( s3 ) )
System.out.println ( "ttSuccess - Students s1 and s3 are the same." );
else
{
System.out.println ( "ttError - Students s1 and s3 are not the same" );
System.out.println ( "tts1 = " + s1 );
System.out.println ( "tts3 = " + s3 );
}
s3.setStudent ( n2, "234567" );
if ( s1.equals ( s3 ) )
{
System.out.println ( "ttError - students should not be the same" );
System.out.println ( "tts1 = " + s1 );
System.out.println ( "tts1 = " + s3 );
}
else
System.out.println ( "ttSuccess - students are not the same" );
// ---- Test the finalize method ---------
System.out.println ( "nnTest the 'finalize' method ------------" );
s1 = null;
System.gc();
System.out.println ( "ttShould see the 'finalize' message ------------" );
// ---- Test the dispose method ----------
System.out.println ( "nnTest the 'dispose' method ------------" );
s2.dispose();
System.out.println ( "ttShould see the 'dispose' message ------------" );
s2 = null;
// ---- Test the hashCode method ---------
s1 = new Student ( s3 );
System.out.println ( "nnTest the 'hashCode' method ------------" );
if ( s1.hashCode ( ) == s3.hashCode ( ) )
System.out.println ( "ttSuccess - hashCode for s1 and s3 are the same." );
else
{
System.out.println ( "ttError - hashCode for s1 and s3 are not the same." );
System.out.println ( "tts1.hashCode = " + s1.hashCode() );
System.out.println ( "tts3.hashCode = " + s3.hashCode() );
}
System.out.println ( );
}
}
Homework Solution: Problem: Using the ‘Name.java’ and ‘Student.java’ files, expand both classes to include the following methods: A ‘copy’ constructor,…
In java
Problem: Using the ‘Name.java’ and ‘Student.java’ refines, referableorious twain arrangees to enclose the subjoined systems:
A ‘copy’ producer,
A ‘clone’ system,
A ‘finalize’ system,
A ‘dispose’ system, and
A ‘hashCode’ system.
A ‘compareTo’ system
Test the upgraded arrangees using the collision ‘TestStudentName.java’ located in ‘Chapter01_Files.zip’. Be believing to enclose extinguishedput communications in twain the ‘finalize’ system and the ‘dispose’ system.
Chapter01 Refine ‘TestStudentName.java’ adown.
// ———————————————–
// TestStudentName.java
// ———————————————–
public arrange TestStudentName
{
public static destitute ocean ( String [ ] args )
{
Name n1 = strange Name ( “Ty”, “Cobb” );
Name n2 = strange Name ( “Babe”, “Ruth” );
// —- Test the representation producer ——–
System.out.println ( “Test the representation producer ————” );
Student s1 = strange Student ( n1, “123456” );
Student s2 = strange Student ( s1 );
s2.setStudent ( n2, “234567” );
if ( s1.equals ( s2 ) )
{
System.out.println ( “ttError – students should referable attributable attributable attributable attributable attributable attributable be the identical” );
System.out.println ( “tts1 = ” + s1 );
System.out.println ( “tts1 = ” + s2 );
}
else
{
System.out.println ( “ttSuccess – students are referable attributable attributable attributable attributable attributable attributable the identical” );
System.out.println ( “tts1 = ” + s1 );
System.out.println ( “tts1 = ” + s2 );
}
// —- Test the clone system ————
System.out.println ( “nnTest the ‘clone’ system ————” );
Student s3 = (Student) s1.clone ( );
if ( s1.equals ( s3 ) )
System.out.println ( “ttSuccess – Students s1 and s3 are the identical.” );
else
{
System.out.println ( “ttError – Students s1 and s3 are referable attributable attributable attributable attributable attributable attributable the identical” );
System.out.println ( “tts1 = ” + s1 );
System.out.println ( “tts3 = ” + s3 );
}
s3.setStudent ( n2, “234567” );
if ( s1.equals ( s3 ) )
{
System.out.println ( “ttError – students should referable attributable attributable attributable attributable attributable attributable be the identical” );
System.out.println ( “tts1 = ” + s1 );
System.out.println ( “tts1 = ” + s3 );
}
else
System.out.println ( “ttSuccess – students are referable attributable attributable attributable attributable attributable attributable the identical” );
// —- Test the finalize system ———
System.out.println ( “nnTest the ‘finalize’ system ————” );
s1 = null;
System.gc();
System.out.println ( “ttShould comprehend the ‘finalize’ communication ————” );
// —- Test the manage system ———-
System.out.println ( “nnTest the ‘dispose’ system ————” );
s2.dispose();
System.out.println ( “ttShould comprehend the ‘dispose’ communication ————” );
s2 = null;
// —- Test the hashCode system ———
s1 = strange Student ( s3 );
System.out.println ( “nnTest the ‘hashCode’ system ————” );
if ( s1.hashCode ( ) == s3.hashCode ( ) )
System.out.println ( “ttSuccess – hashCode coercion s1 and s3 are the identical.” );
else
{
System.out.println ( “ttError – hashCode coercion s1 and s3 are referable attributable attributable attributable attributable attributable attributable the identical.” );
System.out.println ( “tts1.hashCode = ” + s1.hashCode() );
System.out.println ( “tts3.hashCode = ” + s3.hashCode() );
}
System.out.println ( );
}
}
Expert Vindication
TestingStudentName.java
/*
* To vary this permit header, pick-extinguished Permit Headers in Project Properties.
* To vary this template refine, pick-extinguished Tools | Templates
* and referableorious the template in the editor.
*/
package testingstudentname;
public arrange TestingStudentName
{
public static destitute ocean ( String [ ] args ) throws CloneNotSupportedException
{
Name n1 = strange Name ( “Ty”, “Cobb” );
Name n2 = strange Name ( “Babe”, “Ruth” );
// —- Test the representation producer ——–
System.out.println ( “Test the representation producer ————” );
Student s1 = strange Student ( n1, “123456” );
Student s2 = strange Student ( s1 );
s2.setStudent ( n2, “234567” );
if ( s1.equals ( s2 ) )
{
System.out.println ( “ttError – students should referable attributable attributable attributable attributable attributable attributable be the identical” );
System.out.println ( “tts1 = ” + s1 );
System.out.println ( “tts1 = ” + s2 );
}
else
{
System.out.println ( “ttSuccess – students are referable attributable attributable attributable attributable attributable attributable the identical” );
System.out.println ( “tts1 = ” + s1 );
System.out.println ( “tts1 = ” + s2 );
}
// —- Test the clone system ————
System.out.println ( “nnTest the ‘clone’ system ————” );
Student s3 = (Student) s1.clone();
if ( s1.equals ( s3 ) )
System.out.println ( “ttSuccess – Students s1 and s3 are the identical.” );
else
{
System.out.println ( “ttError – Students s1 and s3 are referable attributable attributable attributable attributable attributable attributable the identical” );
System.out.println ( “tts1 = ” + s1 );
System.out.println ( “tts3 = ” + s3 );
}
s3.setStudent ( n2, “234567” );
if ( s1.equals ( s3 ) )
{
System.out.println ( “ttError – students should referable attributable attributable attributable attributable attributable attributable be the identical” );
System.out.println ( “tts1 = ” + s1 );
System.out.println ( “tts1 = ” + s3 );
}
else
System.out.println ( “ttSuccess – students are referable attributable attributable attributable attributable attributable attributable the identical” );
// —- Test the finalize system ———
System.out.println ( “nnTest the ‘finalize’ system ————” );
s1 = null;
System.gc();
System.out.println ( “ttShould comprehend the ‘finalize’ communication ————” );
// —- Test the manage system ———-
System.out.println ( “nnTest the ‘dispose’ system ————” );
s2.dispose();
System.out.println ( “ttShould comprehend the ‘dispose’ communication ————” );
s2 = null;
// —- Test the hashCode system ———
s1 = strange Student ( s3 );
System.out.println ( “nnTest the ‘hashCode’ system ————” );
if ( s1.hashCode ( ) == s3.hashCode ( ) )
System.out.println ( “ttSuccess – hashCode coercion s1 and s3 are the identical.” );
else
{
System.out.println ( “ttError – hashCode coercion s1 and s3 are referable attributable attributable attributable attributable attributable attributable the identical.” );
System.out.println ( “tts1.hashCode = ” + s1.hashCode() );
System.out.println ( “tts3.hashCode = ” + s3.hashCode() );
}
System.out.println ( );
}
}
Name.java
/*
* To vary this permit header, pick-extinguished Permit Headers in Project Properties.
* To vary this template refine, pick-extinguished Tools | Templates
* and referableorious the template in the editor.
*/
package testingstudentname;
/**
arrange Name {
private String ty;
private String cobb;
Name(String ty, String cobb) {
this.ty =ty;
this.cobb =cobb;
}
}
Student.java
/*
* To vary this permit header, pick-extinguished Permit Headers in Project Properties.
* To vary this template refine, pick-extinguished Tools | Templates
* and referableorious the template in the editor.
*/
package testingstudentname;
/**
arrange Student implements Cloneable {
private Name n1;
private String string;
private Name n2;
Student(Student s3) {
}
Student(Name n1, String string) {
this.n1 = n1;
this.string = string;
}
destitute setStudent(Name n2, String string) {
this.n2 =n2;
this.string=string;
}
destitute manage() {
}
public Object clone() throws CloneNotSupportedException
{
return super.clone();
}
}
Output:
