Java Field.getShort方法代碼示例

import java.lang.reflect.Field; //導入方法依賴的package包/類
/**
 * @param id the ID of the packet.
 * @return the packet's name based on it's ID.
 */
public static String getName(int id) {
    for (Field field : MessageIdentifier.class.getDeclaredFields()) {
        if (field.getType().equals(short.class)) {
            try {
                short packetId = field.getShort(null);
                if (packetId == id) {
                    return field.getName();
                }
            } catch (ReflectiveOperationException e) {
                e.printStackTrace();
            }
        }
    }
    return null;
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
int getVal(Field f) {
    try {
        if (f.getType() == int.class) {
            return f.getInt(this);
        } else if (f.getType() == short.class) {
            return (int)f.getShort(this);
        } else if (f.getType() == byte.class) {
            return (int)f.getByte(this);
        } else if (f.getType() == long.class) {
            return (int)f.getLong(this);
        }
    } catch(IllegalAccessException iae) {
        throw new RuntimeException("Setting fields failed");
    }
    throw new RuntimeException("unexpected field type");
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
public static short getShort(Object instance, Field f)
{
    try {
        return f.getShort(instance);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return 0;
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
public static Object getField(Object instance, Field field) throws IllegalAccessException {
	if (UNSAFE != null) {
		if (int.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getInt(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (long.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getLong(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (double.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getDouble(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (void.class.equals(field.getType())) {
			return null;
		} else if (float.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getFloat(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (byte.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getByte(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (char.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getChar(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (boolean.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getBoolean(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else if (short.class.equals(field.getType())) {
			return ((sun.misc.Unsafe) UNSAFE).getShort(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		} else {
			return ((sun.misc.Unsafe) UNSAFE).getObject(instance, ((sun.misc.Unsafe) UNSAFE).objectFieldOffset(field));
		}
	} else { //Fallback if unsafe isn't available
		field.setAccessible(true);
		if (int.class.equals(field.getType())) {
			return field.getInt(instance);
		} else if (long.class.equals(field.getType())) {
			return field.getLong(instance);
		} else if (double.class.equals(field.getType())) {
			return field.getDouble(instance);
		} else if (void.class.equals(field.getType())) {
			return null;
		} else if (float.class.equals(field.getType())) {
			return field.getFloat(instance);
		} else if (byte.class.equals(field.getType())) {
			return field.getByte(instance);
		} else if (char.class.equals(field.getType())) {
			return field.getChar(instance);
		} else if (boolean.class.equals(field.getType())) {
			return field.getBoolean(instance);
		} else if (short.class.equals(field.getType())) {
			return field.getShort(instance);
		} else {
			return field.get(instance);
		}
	}
}
 

import java.lang.reflect.Field; //導入方法依賴的package包/類
/**
 * An introspection based equality predicate for SIPObjects.
 *@param other the other object to test against.
 */
public boolean equals(Object other) {
    if (!this.getClass().equals(other.getClass()))
        return false;
    SIPObject that = (SIPObject) other;
    Class myclass = this.getClass();
    Class hisclass = other.getClass();
    while (true) {
        Field[] fields = myclass.getDeclaredFields();
        if (!hisclass.equals(myclass))
            return false;
        Field[] hisfields = hisclass.getDeclaredFields();
        for (int i = 0; i < fields.length; i++) {
            Field f = fields[i];
            Field g = hisfields[i];
            // Only print protected and public members.
            int modifier = f.getModifiers();
            if ((modifier & Modifier.PRIVATE) == Modifier.PRIVATE)
                continue;
            Class fieldType = f.getType();
            String fieldName = f.getName();
            if (fieldName.compareTo("stringRepresentation") == 0) {
                continue;
            }
            if (fieldName.compareTo("indentation") == 0) {
                continue;
            }
            try {
                // Primitive fields are printed with type: value
                if (fieldType.isPrimitive()) {
                    String fname = fieldType.toString();
                    if (fname.compareTo("int") == 0) {
                        if (f.getInt(this) != g.getInt(that))
                            return false;
                    } else if (fname.compareTo("short") == 0) {
                        if (f.getShort(this) != g.getShort(that))
                            return false;
                    } else if (fname.compareTo("char") == 0) {
                        if (f.getChar(this) != g.getChar(that))
                            return false;
                    } else if (fname.compareTo("long") == 0) {
                        if (f.getLong(this) != g.getLong(that))
                            return false;
                    } else if (fname.compareTo("boolean") == 0) {
                        if (f.getBoolean(this) != g.getBoolean(that))
                            return false;
                    } else if (fname.compareTo("double") == 0) {
                        if (f.getDouble(this) != g.getDouble(that))
                            return false;
                    } else if (fname.compareTo("float") == 0) {
                        if (f.getFloat(this) != g.getFloat(that))
                            return false;
                    }
                } else if (g.get(that) == f.get(this))
                    continue;
                else if (f.get(this) == null && g.get(that) != null)
                    return false;
                else if (g.get(that) == null && f.get(this) != null)
                    return false;
                else if (!f.get(this).equals(g.get(that)))
                    return false;
            } catch (IllegalAccessException ex1) {
                System.out.println("accessed field " + fieldName);
                System.out.println("modifier  " + modifier);
                System.out.println("modifier.private  " + Modifier.PRIVATE);
                InternalErrorHandler.handleException(ex1);
            }
        }
        if (myclass.equals(SIPObject.class))
            break;
        else {
            myclass = myclass.getSuperclass();
            hisclass = hisclass.getSuperclass();
        }
    }
    return true;
}