假設我們有兩個包p1和p2和p2.M12擴展類p1.M1如下: package p1;
public class M1 {
void method1() {
System.out.println("Method 1 called");
}
}
package p2;
import p1.M1;
public class M12 extends M
我安裝了R並試圖安裝附加包:rgl。問題是,我不斷收到此錯誤: installation of package ‘rgl’ had non-zero exit status
這裏是警告的完整列表: > warnings()
Warning messages:
1: In install.packages("rgl") :
installation of package ‘stringi’
我package xy does not exist,但我有這種格式封裝XY: package xy.Xy;
public enum Xy {
some, things, in, an, usual, enum
}
我想導入了這種方式: import xy.*;
public class Usual{
//some usual things
}
文件系統是這
我嘗試安裝汽車和EZanova包RStudio,但他們都失敗,並給出以下錯誤: install.packages('car') Warning in install.packages : dependency 'pbkrtest' is not available % Total % Received % Xferd Average Speed Time Time Time Current Dlo