| Methods Summary |
|---|
| public static void | main(java.lang.String[] args)The main method. Print info about the named class
Class c = Class.forName(args[0]);
print_class(c);
|
| public static java.lang.String | modifiers(int m)Return a string version of modifiers, handling spaces nicely.
if (m == 0) return "";
else return Modifier.toString(m) + " ";
|
| public static void | print_class(java.lang.Class c)Display the modifiers, name, superclass and interfaces of a class
or interface. Then go and list all constructors, fields, and methods.
// Print modifiers, type (class or interface), name and superclass.
if (c.isInterface()) {
// The modifiers will include the "interface" keyword here...
System.out.print(Modifier.toString(c.getModifiers()) + " "+c.getName());
}
else if (c.getSuperclass() != null)
System.out.print(Modifier.toString(c.getModifiers()) + " class " +
c.getName() +
" extends " + c.getSuperclass().getName());
else
System.out.print(Modifier.toString(c.getModifiers()) + " class " +
c.getName());
// Print interfaces or super-interfaces of the class or interface.
Class[] interfaces = c.getInterfaces();
if ((interfaces != null) && (interfaces.length > 0)) {
if (c.isInterface()) System.out.println(" extends ");
else System.out.print(" implements ");
for(int i = 0; i < interfaces.length; i++) {
if (i > 0) System.out.print(", ");
System.out.print(interfaces[i].getName());
}
}
System.out.println(" {"); // Begin class member listing.
// Now look up and display the members of the class.
System.out.println(" // Constructors");
Constructor[] constructors = c.getDeclaredConstructors();
for(int i = 0; i < constructors.length; i++) // Display constructors.
print_method_or_constructor(constructors[i]);
System.out.println(" // Fields");
Field[] fields = c.getDeclaredFields(); // Look up fields.
for(int i = 0; i < fields.length; i++) // Display them.
print_field(fields[i]);
System.out.println(" // Methods");
Method[] methods = c.getDeclaredMethods(); // Look up methods.
for(int i = 0; i < methods.length; i++) // Display them.
print_method_or_constructor(methods[i]);
System.out.println("}"); // End class member listing.
|
| public static void | print_field(java.lang.reflect.Field f)Print the modifiers, type, and name of a field
System.out.println(" " +
modifiers(f.getModifiers()) +
typename(f.getType()) + " " + f.getName() + ";");
|
| public static void | print_method_or_constructor(java.lang.reflect.Member member)Print the modifiers, return type, name, parameter types and exception
type of a method or constructor. Note the use of the Member interface
to allow this method to work with both Method and Constructor objects
Class returntype=null, parameters[], exceptions[];
if (member instanceof Method) {
Method m = (Method) member;
returntype = m.getReturnType();
parameters = m.getParameterTypes();
exceptions = m.getExceptionTypes();
} else {
Constructor c = (Constructor) member;
parameters = c.getParameterTypes();
exceptions = c.getExceptionTypes();
}
System.out.print(" " + modifiers(member.getModifiers()) +
((returntype!=null)? typename(returntype)+" " : "") +
member.getName() + "(");
for(int i = 0; i < parameters.length; i++) {
if (i > 0) System.out.print(", ");
System.out.print(typename(parameters[i]));
}
System.out.print(")");
if (exceptions.length > 0) System.out.print(" throws ");
for(int i = 0; i < exceptions.length; i++) {
if (i > 0) System.out.print(", ");
System.out.print(typename(exceptions[i]));
}
System.out.println(";");
|
| public static java.lang.String | typename(java.lang.Class t)Return the name of an interface or primitive type, handling arrays.
String brackets = "";
while(t.isArray()) {
brackets += "[]";
t = t.getComponentType();
}
return t.getName() + brackets;
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