Java equivalent to python “dir”?

Question

Is there an equivalent to \"dir\" in python for java, or a library which provides similar functionality (i.e. properties of objects and classes output as informative strings

Answer 1

I was thinking if using javap would be a good choice. The man says javap - The Java Class File Disassembler

and I could see the built in methods by

javap java.lang.Double | grep -i int
public static final int MAX_EXPONENT;
public static final int MIN_EXPONENT;
public static final int SIZE;
public int intValue();
public int hashCode();
public int compareTo(java.lang.Double);
public static int compare(double, double);
public int compareTo(java.lang.Object);

Taking System.out.println(),

javap -c java.lang.System | grep -i out
public static final java.io.PrintStream out;
public static void setOut(java.io.PrintStream);
   4: invokestatic  #4                  // Method setOut0:(Ljava/io/PrintStream;)V
   8: putstatic     #98                 // Field out:Ljava/io/PrintStream;

and then do javap java.io.PrintStream