[問題類型]:
程式諮詢
[軟體熟悉度]:
使用者
[問題敘述]:
我試著在java回傳2d string array
一直給我這樣的錯誤
method getStringMatrix with signature ()[[S not found
[程式範例]:
R code:
library(rJava)
.jinit()
.jaddClassPath("pathToClass")
test = .jnew("Mytest")
out = .jcall(test, "[[S", "getStringMatrix", simplify=TRUE) # error
out2 = .jcall(test, "[[I", "getIntMatrix", simplify=TRUE) # It works
workable code:
out = .jcall(test, "[[Ljava/lang/String;", "getStringMatrix", simplify=TRUE)
java code myTest.java:
public class myTest {
public String[][] getStringMatrix(){
String[][] stringMatrix = new String[][]{{"ABC", "BCD"}, {"CDE", "DEF"}};
return stringMatrix;
}
public int[][] getIntMatrix() {
int[][] intMatrix = new int[][]{{1,2,3},{4,5,6}};
return intMatrix;
}
public static void main(String[] args) {
}
}
[關鍵字]:
rjava, string array