Java classpath/classloaders binary conflict test

classpath-conflict-test.sh

#!/bin/sh
rm -rf dir1 dir2;

mkdir -p dir1/pkg;
cat >File.java <<EOL
package pkg;
public class File {
    public static void main(String[] args) {
        System.out.println("dir1/File");
    }
}
EOL
javac File.java;
mv File.class ./dir1/pkg;

mkdir -p dir2/pkg;
cat >File.java <<EOL
package pkg;
public class File {
    public static void main(String[] args) {
        System.out.println("dir2/File");
    }
}
EOL
javac File.java;
mv File.class ./dir2/pkg;

OUTPUT_DIR1_DIR2=$(java -cp dir1:dir2 pkg.File)
OUTPUT_DIR2_DIR1=$(java -cp dir2:dir1 pkg.File)
echo ""
echo "  RESULT OF 'java -cp dir1:dir2 pkg.File' =>"
echo "  $OUTPUT_DIR1_DIR2"
echo ""
echo "  RESULT OF 'java -cp dir2:dir1 pkg.File' =>"
echo "  $OUTPUT_DIR2_DIR1"
echo ""

rm File.java;
rm -rf dir1 dir2;

Trying to prove the point mentioned by AlexR in:
https://stackoverflow.com/a/9757698/1556045

default URLClassLoader picks up class-file content from the first classpath entry

Read more in depth about classloaders in:
https://www.cs.rit.edu/~ark/lectures/cl/05_02_00.html

curl -L https://gist.github.com/nimatrueway/baecf702d04f2b2f26385a6e4da65212/raw/classpath-conflict-test.sh | bash