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public interface UserDao {
public void save();
}
public class Override_Overload implements UserDao{
@Override
public void save() {
// TODO Auto-generated method stub
}
//ÒÔÏÂÈýÖз½¾ÍÊÇoverloadÊÇÖØÔØ
public int find(String name){
return 1;
}
public int find(String name,Long id){
return 1;
}
public int find(Long id){
return 1;
}
}
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1.±à³Ì½ç×îÖøÃûµÄÒ»¾ä»°“Hello world!”,ÈκÎÒ»¸ö³ÌÐòÔ±Æð²½Ê±±ØÓöµÄÓï¾ä
public class HelloWorld {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.print("Hello World!");
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Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld/class
Caused by: java.lang.ClassNotFoundException: HelloWorld.class
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
  ......