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      subroutine sub1(i)
          INTEGER i;
          PRINT*, "SUB1 CALLED"
          PRINT*, i
      END subroutine
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import com.sun.jna.Library;
import com.sun.jna.ptr.ByReference;
public interface FLib extends Library {
    void sub1_(ByReference  i);
}
´´½¨Ò»¸öÖ÷³ÌÐòMain.java
import com.sun.jna.Native;
import com.sun.jna.ptr.IntByReference;
public class Main {
    public static void main(String[] args) {
        // Loading dynamically the library
        FLib lib2 = (FLib) Native.loadLibrary("libFortranDLL", FLib.class);
        IntByReference a = new IntByReference(1234);
        lib2.sub1_(a);
    }
}
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 SUB1 CALLED
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package com.ghb.crp.file;   
  
import java.io.BufferedInputStream;   
import java.io.BufferedOutputStream;   
import java.io.File;   
import java.io.FileInputStream;   
import java.io.FileOutput ......