サンプル

protected void finalize() throws Throwable {
try {
System.out.println("finalize was called"); //$NON-NLS-1$
} finally {
super .finalize();
}
}

public static void main(String[] args){
ExplicitFinalize_Example ef = new ExplicitFinalize_Example();
try {
ef.finalize();
}catch (Throwable th){
th.printStackTrace();
}
}

解決策
finalize() を明示的に呼び出さないようにします。

protected void finalize() throws Throwable {
try {
System.out.println("finalize was called"); //$NON-NLS-1$
} finally {
super .finalize();
}
}

public static void main(String[] args){
ExplicitFinalize_Solution ef = new ExplicitFinalize_Solution();
}