我的代码发布在下面。我生成随机数字等级并为其分配字母等级。然后将创建一个客户端类来测试该程序。我的问题是该计划的结束。我收到一个错误的错误表达。也许我只需要一双新的眼睛来看待这个。我似乎无法弄明白。谢谢！
import java.util.Random;
public class Convertgrade
{
private int numberOfStudents;
private int[] studentGrades = new int[100];
public Convertgrade()
{
numberOfStudents = 0;
}
//one arg constructor, sets numberOfStudents = students
public Convertgrade(int students)
{
numberOfStudents = students;
setGrades(students);
}
//mutator
public void setStudents(int students)
{
if(students < 0)
{
numberOfStudents = 0;
}
else
{
numberOfStudents = students;
setGrades(students);
}
}
//accessor
public int getStudents()
{
return numberOfStudents;
}
public void setGrades(int students)
{
Random randomNumber = new Random();
for(int count = 0; count < students; count++)
{
studentGrades[count] = randomNumber.nextInt(101);
}
}
public char[] getLetterGrades()
{
char[] letterGrades = new char[numberOfStudents];
for(int count = 0; count < numberOfStudents; count++)
{
if(studentGrades[count] <= 59)
letterGrades[count] = 'F';
else if(studentGrades[count] <= 69)
letterGrades[count] = 'D';
else if(studentGrades[count] <= 79)
letterGrades[count] = 'C';
else if(studentGrades[count] <= 89)
letterGrades[count] = 'B';
else if(studentGrades[count] <= 100)
letterGrades[count] = 'A';
}
return letterGrades;
}
public int getAs()
{
int numberOfAs = 0;
for(int count = 0; count < numberOfStudents; count++)
{
if(studentGrades[count] >= 90)
numberOfAs++;
}
return numberOfAs;
}
public int[] getNumberOfEachGrade()
{
int[] numberOfGrades = new int[numberOfStudents];
for(int count = 0; count < numberOfStudents; count++)
{
if(studentGrades[count] <= 59)
numberOfGrades[count] ++;
else if(studentGrades[count] <= 69)
numberOfGrades[count] ++;
else if(studentGrades[count] <= 79)
numberOfGrades[count] ++;
else if(studentGrades[count] <= 89)
numberOfGrades[count] ++;
else if(studentGrades[count] <= 100)
numberOfGrades[count] ++;
}
return numberOfGrades;
}
public String toString()
{
System.out.format("The number of students = %d\n", numberOfStudents);
for(int count = 0; count < numberOfStudents; count++)
{
System.out.format("Grade %d is %d\n", count + 1, studentGrades[count]);
}
return String.format("\n");
public void sort_array(int[] array);
//GETTING ERRORS HERE^: ILLEGAL START OF EXPRESSION
{
int intTemp;
int count = 0;
int index = 0;
for(count = 0; count < (array.length - 1); count++)
{
for(index = 0; index < (array.length - 1); index++)
{
if(array[index] > array[index +1])
{
intTemp = array[index +1];
array[index +1] = array[index];
array[index] = intTemp;
}
}
}
}
}
}
答案 0 :(得分：2)
我强烈建议您使用IDE，例如Eclipse或IntelliJ。或者任何可以帮助您维护健康代码样式的东西，例如Sublime Text和一些Java代码样式包。
一切都会做！
你有3个问题：
}）第149行（大致）这次我为你清理了你的代码，但这只是输入问题，希望你能找到一种方法来避免将来:)。
import java.util.Random;
public class Convertgrade {
private int numberOfStudents;
private final int[] studentGrades = new int[100];
public Convertgrade() {
this.numberOfStudents = 0;
}
// one arg constructor, sets numberOfStudents = students
public Convertgrade(final int students) {
this.numberOfStudents = students;
setGrades(students);
}
// mutator
public void setStudents(final int students) {
if (students < 0) {
this.numberOfStudents = 0;
} else {
this.numberOfStudents = students;
setGrades(students);
}
}
// accessor
public int getStudents() {
return this.numberOfStudents;
}
public void setGrades(final int students) {
final Random randomNumber = new Random();
for (int count = 0; count < students; count++) {
this.studentGrades[count] = randomNumber.nextInt(101);
}
}
public char[] getLetterGrades() {
final char[] letterGrades = new char[this.numberOfStudents];
for (int count = 0; count < this.numberOfStudents; count++) {
if (this.studentGrades[count] <= 59) {
letterGrades[count] = 'F';
} else if (this.studentGrades[count] <= 69) {
letterGrades[count] = 'D';
} else if (this.studentGrades[count] <= 79) {
letterGrades[count] = 'C';
} else if (this.studentGrades[count] <= 89) {
letterGrades[count] = 'B';
} else if (this.studentGrades[count] <= 100) {
letterGrades[count] = 'A';
}
}
return letterGrades;
}
public int getAs() {
int numberOfAs = 0;
for (int count = 0; count < this.numberOfStudents; count++) {
if (this.studentGrades[count] >= 90) {
numberOfAs++;
}
}
return numberOfAs;
}
public int[] getNumberOfEachGrade() {
final int[] numberOfGrades = new int[this.numberOfStudents];
for (int count = 0; count < this.numberOfStudents; count++) {
if (this.studentGrades[count] <= 59) {
numberOfGrades[count]++;
} else if (this.studentGrades[count] <= 69) {
numberOfGrades[count]++;
} else if (this.studentGrades[count] <= 79) {
numberOfGrades[count]++;
} else if (this.studentGrades[count] <= 89) {
numberOfGrades[count]++;
} else if (this.studentGrades[count] <= 100) {
numberOfGrades[count]++;
}
}
return numberOfGrades;
}
@Override
public String toString() {
System.out.format("The number of students = %d\n", this.numberOfStudents);
for (int count = 0; count < this.numberOfStudents; count++) {
System.out.format("Grade %d is %d\n", count + 1, this.studentGrades[count]);
}
return String.format("\n");
}
public void sort_array(final int[] array) {
int intTemp;
int count = 0;
int index = 0;
for (count = 0; count < (array.length - 1); count++) {
for (index = 0; index < (array.length - 1); index++) {
if (array[index] > array[index + 1]) {
intTemp = array[index + 1];
array[index + 1] = array[index];
array[index] = intTemp;
}
}
}
}
}
答案 1 :(得分：0)
你在错误的地方有一些大括号{}和分号。
你的缩进看起来有些混乱 - 也许这只是你在发布这篇文章时如何复制代码，但是小心缩进可能会使这些错误变得更加明显。
答案 2 :(得分：0)
替换此部分：
return String.format("\n");
public void sort_array(int[] array);
//GETTING ERRORS HERE^: ILLEGAL START OF EXPRESSION
由此：
return String.format("\n");
}
public void sort_array(int[] array) {
// OMG THERE ISN'T ERRORS ANYMORE :)
如果你看到这样的“回归”陈述悬而未决，下次你可以说出一些奇怪的事情......