What Is @test In Java I Found It On A Code .

Help with Student.java code?

public class Student
{
private String lastName;
private String firstName;
private int studentID;
private int units; //units taken
private int gradePoints ;

public Student( String lname, String fname, int id, int uts, int gpts) { }

public double gpa() { }

public void addGrade( int u, char grade) { } /* Adds u to the units variable and adds the grade points
corresponding to letter grade to gradePoints; prints an
error message if u <=0 or if grade is not an A, B, C, D, or F
and in that case does not make the changes*/

public String toString() { } /*Returns a string that prints the student data in following format:
Austen, Ann (1000 ) Units: 55 Grade Points: 56 GPA: 1.01 */


/*getters */
public String getLastName() { }
public String getFirstName() { }
public int getStudentID() { }
public int getUnits() { }

CAN SOME ONE EDIT MY JAVA CODE?

import java.util.*;

public class Grades
{
public static void main(String[] args)
{
Student student1 = new Student("Mary");
Student student2 = new Student("Mike");

student1.inputGrades();
student2.inputGrades();

System.out.println(student1);
System.out.println(student2);
}
}

class Student
{
int gradetest1, gradetest2;
String name;

public Student(String studentName)
{
name = studentName;
}

// inputGrades: prompt for and read in student's grades for test1 and test2.
// Use name in prompts, e.g., "Enter's Joe's score for test1".
public void inputGrades()
{
Scanner Sc = new Scanner(System.in);
do
{
System.out.println("Enter " + name + "'s First Test Grade:");
gradetest1 = Sc.nextInt();
if(gradetest1 < 0 || gradetest1 > 100)
{
System.out.println("Illegal value: enter grades again!");
continue;
}
else
{
break;
}
}while(true);

do
{
System.out.println("Enter " + name + "'s Second Test Grade:");
gradetest2 = Sc.nextInt();
if(gradetest2 < 0 || gradetest2 > 100)
{
System.out.println("Illegal value: enter grades again!");
continue;
}
else
{
break;
}
}while(true);
}

public int getAverage()
{
int average = gradetest1 + gradetest2;
return average/2;
}

public String getName()
{
return name;
}
public String toString()
{
return "Name: " + name + " Test1: " + gradetest1 + " Test2: " + gradetest2;
}

}

How can I write a test program to test if my stock class java code works?

i expect you want to implement something like this...

import java.text.*;

public class TestStock {
public static void main(String[] args) {
Stock test1 = new Stock();
Stock test2 = new Stock(34.5, 34.35);
print(test2);

unitTests();

System.exit(0);
}

private static void print(Stock stock) {
System.out.printf("Previous Closing Price: %,.2f%n", stock.getPreviousClosing());
System.out.printf("Current Price: %,.2f%n", stock.getCurrentPrice());
System.out.printf("Price Change: %,.2f%%%n", stock.getChangePercent());
}

/*
* Performs unit tests...
* Usage: java -ea TestStock.class
*/
private static void unitTests() {
Stock stock = new Stock(34.5, 34.35);
double expected = (34.35 - 34.5) / 34.5 * 100;
double actual = stock.getChangePercent();
assert (expected == actual) : System.out.printf("Expected <%f> but was <%f>%n", expected, actual);
System.out.printf("%f %f%n", expected, actual);

stock = null;
stock = new Stock(100, 150);
actual = stock.getChangePercent();
expected = 50;
assert (expected == actual) : System.out.printf("Expected <%f> but was <%f>%n", expected, actual);
System.out.printf("%f %f%n", expected, actual);
}
}

class Stock {
private double previous;
private double current;

public Stock() {
this(0, 0);
}

public Stock(double previous, double current) {
this.previous = previous;
this.current = current;
}

public double getPreviousClosing() {
return this.previous;
}

public double getCurrentPrice() {
return this.current;
}

public double getChangePercent() {
return (getCurrentPrice() - getPreviousClosing()) / getPreviousClosing() * 100;
}
}

Is there a way to cheat on an online test that runs on java?

Download the Java app to your computer, and decompile it. After that, you should be able to search the source code for the answers.

If you aren't smart enough to be able to do this, you certainly aren't smart enough to have the option of cheating it.