几年前我有一些java课程,由于缺乏使用,它们都消失了。现在我已经回到了它。我正在按照一个非常简单的教程来构建使用sublime的东西(它很简单,我没有费心去获得一个合适的IDE)这两个文件是:
package hello;
public class HelloWorld {
public static void main(String[] args) {
Greeter greeter = new Greeter();
System.out.println(greeter.sayHello());
System.out.println("random alt shift");
}
}
和
package hello;
public class Greeter {
public String sayHello() {
return "Hello world!";
}
}
Greeter编译用餐但是HelloWorld给了我以下错误:
javac HelloWorld.java
HelloWorld.java:6: error: cannot find symbol
Greeter greeter = new Greeter();
^
symbol: class Greeter
location: class HelloWorld
HelloWorld.java:6: error: cannot find symbol
Greeter greeter = new Greeter();
^
symbol: class Greeter
location: class HelloWorld
2 errors
如果我添加“import hello.Greeter;”我明白了:
HelloWorld.java:2: error: cannot find symbol
import hello.Greeter;
^
symbol: class Greeter
location: package hello
HelloWorld.java:6: error: cannot find symbol
Greeter greeter = new Greeter();
^
symbol: class Greeter
location: class HelloWorld
HelloWorld.java:6: error: cannot find symbol
Greeter greeter = new Greeter();
^
symbol: class Greeter
location: class HelloWorld
3 errors
在IDE上它运行良好,任何人都可以如此善良地解释发生了什么
答案 0 :(得分:7)
javac HelloWorld.java
问题出在这里。你在错误的目录中。你应该在一个级别,包层次结构开始,你应该发布
javac hello/HelloWorld.java