//  Field.java -- Methods and Variablespackage toba.classfile;import java.io.*;public class Field {		// field or method data    public String name;		// declared name    public String cname;	// name used in C    public String signature;	// signature    public int hashcode;	// hash code for method searching    public int access;		// access flags    public Attribute attributes[];	// attributes    public Field next;		// link to other methods with same name    // not set by constructor, but later by Supers.methTable():    public int overrides;	// if >0, overrides ancestor method this                                 // many levels up    public int tableslot;	// method/var table slot; -1 if unset    public int classfilePos;    // index of field in classfile    public Object tableObj;     // what is in this table slotprivate voidfinishField (){    hashcode = Names.hashinterface(name, signature);}//  new Field(stream, ctab) -- load field or method info from class fileField(DataInputStream d, Constant c[])    throws IOException{    access = d.readUnsignedShort();    name = (String)c[d.readUnsignedShort()].value;    signature = (String)c[d.readUnsignedShort()].value;    attributes = new Attribute[d.readUnsignedShort()];    for (int i = 0; i < attributes.length; i++) {	attributes[i] = new Attribute(d, c);    }    tableslot = -1;    finishField ();}/* Characters that denote field types in parameter/return descriptors */public static final char FT_byte      = 'B';public static final char FT_char      = 'C';public static final char FT_double    = 'D';public static final char FT_float     = 'F';public static final char FT_int       = 'I';public static final char FT_long      = 'J';public static final char FT_object    = 'L';public static final char FT_short     = 'S';public static final char FT_boolean   = 'Z';public static final char FT_array     = '[';public static final char FT_void      = 'V';/** Return the size, in bytes, of the native representation of the field.  * Field had better name a variable, not a method.  * @returns size in bytes of field value  */public intgetVarFieldSize (){    switch (signature.charAt (0)) {	case FT_void:     return 0;	case FT_byte:     return 1;	case FT_char:     return 2;	case FT_double:   return 8;	case FT_float:    return 4;	case FT_int:      return 4;	case FT_long:     return 8;	case FT_short:    return 2;	case FT_boolean:  return 1;        case FT_object:   return 4;	default:            throw new InternalError ("getVarFieldSize: Unrecognized field type " + signature.charAt (0));    }}public StringtoString (){    return name + " (" + signature + ") @ " + tableslot + "/" + overrides;}public booleanequals (Field that){    // Hopefully, we'll hit this most often, but I don't trust that.    if (that == this) {        return true;    }    // Close enough if all these match. */    return (name.equals (that.name) &&            signature.equals (that.signature) &&            (access == that.access) &&            (tableslot == that.tableslot));    }public booleanisInArray (Field fa []){    boolean islocal;    int j;    /* Determine whether we're a member of this array */    islocal = false;    j = fa.length - 1;    while ((! islocal) &&           (0 <= j)) {        islocal = this.equals (fa [j]);        --j;    }    return islocal;}} // class Field