这是我重新编写的新编码：

ThreeDPoint.java

public class ThreeDPoint{

private double x, y, z;

public threeDPoint(){

coordX=0;

coordY=0;

coordZ=0;

}

public threeDPoint(double x, double y, double z){

coordX = x;

coordY = y;

coordZ = z;

}

public double getCoord(double x, double y, double z){

return coordX;

return coordY;

return coordZ;

}

}

Main.java

import java.util.Scanner;

公共类Main {

double coordX, coordY, coordZ;

public static void main(String[] args){

threeDPoint myThreeDPoint=new threeDPoint();

Scanner sc=new Scanner(System.in);

String coordX, coordY, coordZ;

System.out.println("Input Coordinate X");

myThreeDPoint.coordX(sc.nextDouble());

System.out.println("Input Coordinate Y");

myThreeDPoint.coordY(sc.nextDouble());

System.out.println("Input Coordinate Z");

myThreeDPoint.coordZ(sc.nextDouble());

}

}

它给了我这些错误：构建输出： C:\Users\BurneySoo\Documents\Main.java:8: error: cannot find symbol threeDPoint myThreeDPoint=new threeDPoint(); ^ symbol: class threeDPoint location: class Main C:\Users\BurneySoo\Documents\Main.java:8: error: cannot find symbol threeDPoint myThreeDPoint=new threeDPoint(); ^ symbol: class threeDPoint location: class Main 2 errors

一般产出： Error: Could not find or load main class Main

我究竟做错了什么？

非常感谢代码Gagandeep . 不知何故，我尝试了它们，但它发出的错误比以前更多 .

C：\ Users \ BurneySoo \ Documents \ ThreeDPoint.java：5：错误：方法声明无效;需要返回类型

public threeDPoint(){

^

C：\ Users \ BurneySoo \ Documents \ ThreeDPoint.java:11：错误：方法声明无效;需要返回类型

public threeDPoint(double x, double y, double z){

^

C：\ Users \ BurneySoo \ Documents \ Main.java:14:error：找不到符号

myTreeDPoint.coordX(sc.nextLine());

^

symbol：变量myTreeDPoint location：class Main

C：\ Users \ BurneySoo \ Documents \ Main.java:17:error：找不到符号

myTreeDPoint.coordY(sc.nextLine());

^

symbol：变量myTreeDPoint location：class Main

C：\ Users \ BurneySoo \ Documents \ Main.java:20:error：找不到符号

myTreeDPoint.coordZ(sc.nextLine());

^

symbol：变量myTreeDPoint location：class Main

C：\ Users \ BurneySoo \ Documents \ Main.java:22：错误：非静态变量coordY无法从静态上下文引用

myThreeDPoint.setCoord(coordX, coordY, coordZ);

^

C：\ Users \ BurneySoo \ Documents \ Main.java:22：错误：非静态变量coordZ无法从静态上下文引用

myThreeDPoint.setCoord(coordX, coordY, coordZ);

^

C：\ Users \ BurneySoo \ Documents \ Main.java：22：错误：类ThreeCooint中的方法setCoord不能应用于给定的类型;

myThreeDPoint.setCoord(coordX, coordY, coordZ);

^

required：double，double，double found：String，double，double reason：实际参数String不能通过方法调用转换转换为double

C：\ Users \ BurneySoo \ Documents \ ThreeDPoint.java：6：错误：找不到符号

coordX=0;

^

symbol：变量coordX location：class ThreeDPoint

C：\ Users \ BurneySoo \ Documents \ ThreeDPoint.java：7：错误：找不到符号

coordY=0;

^

symbol：变量coordY位置：类ThreeDPoint

C：\ Users \ BurneySoo \ Documents \ ThreeDPoint.java:8:error：找不到符号

coordZ=0;

^

符号：变量coordZ位置：类ThreeDPoint

C：\ Users \ BurneySoo \ Documents \ ThreeDPoint.java:12:error：找不到符号

coordX = x;

^

symbol：变量coordX location：class ThreeDPoint

C：\ Users \ BurneySoo \ Documents \ ThreeDPoint.java:13:error：找不到符号

coordY = y;

^

symbol：变量coordY位置：类ThreeDPoint

C：\ Users \ BurneySoo \ Documents \ ThreeDPoint.java:14:error：找不到符号

coordZ = z;

^

符号：变量coordZ位置：类ThreeDPoint

14个错误

它仍然不会提示我在一般输出中输入坐标X.它只给了我：

Error: Could not find or load main class Main