好的，为了简短起见，我有3个java文件。第一个是主要的，另外两个是我试图在我的主要内部使用的类。出于某种原因，当我通过右键单击包并创建一个新类来创建netbeans中的其他两个类时，这些类似乎不是主项目或＆＃34;包的一部分。 ＃34;换句话说，我在其他课程中创建的方法并没有链接到我的主要课程。 ＆＃34; Point3d，translate，scale，translate，rotate，line3d是我的主要错误的方法。任何帮助将不胜感激，谢谢。
头等舱
package ddunlap_3dcoordinates;
import java.util.*;
/**
*
* @author Aiden
*/
public class DDunlap_3dCoordinates {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
int x, y, z;
x = 2;
y = 3;
z = 4;
Point3d pointA = new Point3d(x, y, z);
//Let verify our starting conditions
System.out.println("Initial Points");
System.out.println(pointA.asString());
System.out.println("");
//Translate Test
System.out.println("Translate all -1");
pointA.translate(-1, -1, -1);
System.out.println(pointA.asString());
System.out.println("");
//Scale Test
System.out.println("Scale by 2");
pointA.scale(2, 2, 2);
System.out.println(pointA.asString());
System.out.println("");
//Rotate
System.out.println("Rotate 180 with respect to x-axis");
pointA.rotate(180, "x");
System.out.println(pointA.asString());
System.out.println("Rotate 180 with respect to y-axis");
pointA.rotate(180, "y");
System.out.println(pointA.asString());
System.out.println("Rotate 180 with respect to z-axis");
pointA.rotate(180, "z");
System.out.println(pointA.asString());
System.out.println("");
//Resetting points
pointA = null;
pointA = new Point3d(x, y, z);
Point3d pointB = new Point3d(0, 0, 0);
Line3d lineAB = new Line3d(pointA, pointB);
System.out.println("Line AB created");
System.out.println("Point A: " + lineAB.getA().asString());
System.out.println("Point B: " + lineAB.getB().asString());
System.out.println("");
//Scale line points
System.out.println("Scale by 2");
lineAB.scale(2, 2, 2);
System.out.println("Point A: " + lineAB.getA().asString());
System.out.println("Point B: " + lineAB.getB().asString());
System.out.println("");
//Translate by 1,1,1
System.out.println("Translate by 1,1,1");
lineAB.translate(1, 1, 1);
System.out.println("Point A: " + lineAB.getA().asString());
System.out.println("Point B: " + lineAB.getB().asString());
System.out.println("");
//Translate by -1.-1,-1
System.out.println("Translate by -1,-1,-1");
lineAB.translate(-1, -1, -1);
System.out.println("Point A: " + lineAB.getA().asString());
System.out.println("Point B: " + lineAB.getB().asString());
System.out.println("");
//Rotate
System.out.println("Rotate 180 with respect to x-axis");
lineAB.rotate(180, "x");
System.out.println("Point A: " + lineAB.getA().asString());
System.out.println("Point B: " + lineAB.getB().asString());
System.out.println("");
System.out.println("Rotate 180 with respect to y-axis");
lineAB.rotate(180, "y");
System.out.println("Point A: " + lineAB.getA().asString());
System.out.println("Point B: " + lineAB.getB().asString());
System.out.println("");
System.out.println("Rotate 180 with respect to z-axis");
lineAB.rotate(180, "z");
System.out.println("Point A: " + lineAB.getA().asString());
System.out.println("Point B: " + lineAB.getB().asString());
System.out.println("");
System.out.println("");
}
}
第二课
public class Point3d {
private double x, y, z;
public Point3d(double x, double y, double z) {
//Using this.variable will assign the value to the class.variable
//This can be avoided by renaming the arguments above
this.x = x;
this.y = y;
this.z = z;
}
//Mutator
void setX(double X) {
x = X;
}
void sety(double Y) {
y = Y;
}
void setZ(double X) {
z = X;
}
void setPoints(double X, double Y, double Z) {
x = X;
y = Y;
z = Z;
}
//Accessor
double getX() {
return x;
}
double getY() {
return y;
}
double getZ() {
return z;
}
//Scale
void scale(double xFactor, double yFactor, double zFactor){
x = x*xFactor;
y = y*yFactor;
z = z*zFactor;
}
//Translate
void translate(double xFactor, double yFactor, double zFactor){
x += xFactor;
y += yFactor;
z += zFactor;
}
//Rotate
void rotate(double theta, String axis){
//If invalid values are passed reject an notify user
if(axis.isEmpty() || theta == 0 || axis.length() != 1){
System.out.println("Error: Invalid args");
return;
}
//Math.trigs expects radians! Convert degrees to radians
theta = theta * (Math.PI/180);
//Convert axis to lower
axis = axis.toLowerCase();
//x rotation
if(axis.equals("x")){
//x = x;
y = (y * Math.cos(theta) - (z * Math.sin(theta)));
z = (y * Math.sin(theta)) + (z * Math.cos(theta));
return;
}
//y rotation
if(axis.equals("y")){
x = x * Math.cos(theta) + z * Math.sin(theta);
//y = y;
//0 minus x is -x
z = (0-x) * Math.sin(theta) + z * Math.cos(theta);
return;
}
if(axis.equals("z")){
x = x * Math.cos(theta) - y * Math.sin(theta);
y = x * Math.sin(theta) + y * Math.cos(theta);
//z = z;
}
}
//Value retrieval for debugging
String asString(){
return "X: " + x + " Y: " + y + " Z: " + z;
}
}
第三课
public class Line3d {
Point3d lineA;
Point3d lineB;
Line3d(Point3d a, Point3d b) {
lineA = new Point3d(a.getX(), a.getY(), a.getZ());
lineB = new Point3d(b.getX(), b.getY(), b.getZ());
}
void setA(Point3d a) {
//Java has a garbage collector and you do not need to do this
//but setting an object to null will close all references to the object
//and allow Java GC to clean it up
lineA = null;
lineA = new Point3d(a.getX(), a.getY(), a.getZ());
}
void setB(Point3d b) {
lineB = null;
lineB = new Point3d(b.getX(), b.getY(), b.getZ());
}
//We already have an object to handle points, using the object will allow us to reuse code
Point3d getA() {
return lineA;
}
Point3d getB() {
return lineB;
}
void scale(double xFactor, double yFactor, double zFactor) {
lineA.scale(xFactor, yFactor, zFactor);
lineB.scale(xFactor, yFactor, zFactor);
}
void translate(double xFactor, double yFactor, double zFactor) {
lineA.translate(xFactor, yFactor, zFactor);
lineB.translate(xFactor, yFactor, zFactor);
}
void rotate(double degrees, String axis){
lineA.rotate(degrees, axis);
lineB.rotate(degrees, axis);
}
}
答案 0 :(得分：0)
尝试将文件放在同一文件夹和驱动程序java代码（包含main函数）中导入类，然后尝试再次运行代码。
答案 1 :(得分：0)
我在NetBeans中遇到了类似的错误。确保将源文件添加到项目中。然后，在<{1}}中停用 保存时编译。
来自here。
答案 2 :(得分：0)
如果您对多个类有疑问，可以考虑在github.com上创建存储库，以便协作者可以看到您创建的文件结构。
使用ide时，您创建的代码将存在于计算机的3个位置。 1）在 src 文件夹的各种包中以纯文本格式显示。 2）作为 bin 文件夹中的较低级别说明。 3）在ide的对象堆栈上显示和操作代码。
现在真的只有一个你需要担心的，那就是 src 。由于存在对象堆栈而您没有考虑它，并且在构建/运行代码时构造了bin。在您的源代码（src）中，您应该有子文件夹，这些是您的包。这些包中的类能够访问同一包中的类，其中包含具有较长地址的其他包中的类名和类，例如：
.
├── pack1
│ ├── class1
│ └── class2
└── pack2
└── class3
class1的顶部可能有类似
的东西package pack1;
import class2;
import pack2.class3;
或导入整个pack2
import pack2.*;
看起来你的所有课程都在一个文件中......这不是你要走的路。面向对象设计的理念是代码自然地委托给类对象。保持井井有条。一个中间的例子就像我为一个班级组合的这个tetris游戏。
答案 3 :(得分：-1)
2.我认为这是错误的
int x, y, z;
x = 2;
y = 3;
z = 4;
Point3d pointA = new Point3d(x, y, z);
你不能传递int类型参数它应该是double类型参数。