{"id":89835,"date":"2024-11-25T18:00:58","date_gmt":"2024-11-25T12:30:58","guid":{"rendered":"https:\/\/techvidvan.com\/tutorials\/?p=89835"},"modified":"2024-11-25T18:45:56","modified_gmt":"2024-11-25T13:15:56","slug":"java-objectstreamfield-class","status":"publish","type":"post","link":"https:\/\/techvidvan.com\/tutorials\/java-objectstreamfield-class\/","title":{"rendered":"Java ObjectStreamField Class"},"content":{"rendered":"

An explanation from a Serializable class regarding a Serializable field. A class’s Serializable fields are declared using an array of ObjectStreamFields.<\/p>\n

Explanation<\/h2>\n

The Java Object Stream field class describes a serializable field from a serializable class. A class’s Serializable fields are declared using an array of ObjectStreamFields.<\/p>\n

Constructor<\/h3>\n\n\n\n\n\n
Constructor\u00a0<\/strong><\/td>\nDescription\u00a0<\/strong><\/td>\n<\/tr>\n
ObjectStreamField(String name, Class<?><\/span>\u00a0<\/span><\/td>\nUsing this method, a Serializable field of the given type is created.<\/span><\/td>\n<\/tr>\n
ObjectStreamField(String name, Class<?> type, boolean unshared)<\/span><\/td>\nThis method uses the specified name and type to generate an ObjectStreamField representing a serializable field.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Type<\/strong><\/td>\nMethod\u00a0<\/strong><\/td>\nDescription\u00a0<\/strong><\/td>\n<\/tr>\n
compareTo(Object obj)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/td>\nInt<\/span><\/td>\nComparing this field with another ObjectStreamField is the method used here.<\/span><\/td>\n<\/tr>\n
getName()<\/span><\/td>\nString\u00a0<\/span><\/td>\nThis technique provides the field name.<\/span><\/td>\n<\/tr>\n
Getoffset()<\/span><\/td>\nInt<\/span><\/td>\nThis method returns the offset of the field within the instance data.<\/span><\/td>\n<\/tr>\n
getType()<\/span><\/td>\nClass<\/span><\/td>\nIt provides the field type for the get type method.<\/span><\/td>\n<\/tr>\n
getTypeCode()<\/span><\/td>\nChar<\/span><\/td>\nThis method returns the character encoding of the field type.<\/span><\/td>\n<\/tr>\n
getTypeString()<\/span><\/td>\nString\u00a0<\/span><\/td>\nThis method returns the JVM type signature.<\/span><\/td>\n<\/tr>\n
isPrimitive()<\/span><\/td>\nBoolean<\/span><\/td>\nIf the field has a primitive type, it returns true.<\/span><\/td>\n<\/tr>\n
isUnshared()<\/span><\/td>\nBoolean\u00a0<\/span><\/td>\nIf this ObjectStreamField instance represents a serializable field, it returns a boolean value indicating whether or not it is unshared.<\/span><\/td>\n<\/tr>\n
setOffset( int offset)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/td>\nProtected void<\/span><\/td>\nThis method gives back the offset within the data instance.<\/span><\/td>\n<\/tr>\n
toString()<\/span><\/td>\nString\u00a0<\/span><\/td>\nA string describing every field in this field is returned.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The encoding are as follows:<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n
B<\/span><\/td>\nbyte<\/span><\/td>\n<\/tr>\n
D<\/span><\/td>\ndouble\u00a0<\/span><\/td>\n<\/tr>\n
F<\/span><\/td>\nfloat<\/span><\/td>\n<\/tr>\n
I<\/span><\/td>\nint<\/span><\/td>\n<\/tr>\n
J<\/span><\/td>\nlong<\/span><\/td>\n<\/tr>\n
L<\/span><\/td>\nclass or interface<\/span><\/td>\n<\/tr>\n
S<\/span><\/td>\nshort\u00a0<\/span><\/td>\n<\/tr>\n
Z<\/span><\/td>\nboolean<\/span><\/td>\n<\/tr>\n
[<\/span><\/td>\narray\u00a0<\/span><\/td>\n<\/tr>\n
C<\/span><\/td>\nchar<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Example<\/h4>\n
import java.io.*; \r\npublic class\r\nObject { \r\n\r\n     \r\n\r\n   public static void main(String[] args) {\r\n      Object xyz = Object.lookupAny(Integer.class);\r\n\r\n      Object field = xyz.getField(\"value\");\r\n      ObjectStreamClass xyz2 = ObjectStreamClass.lookupAny(Float.class); \r\n\r\n      Object field2 = xyz.getField(\"value\");\r\n      System.out.println(\"\" + field.compareTo(field2)); \r\n        \r\n   } \r\n}<\/pre>\n
Output <\/strong>
\n0<\/p>\n
Example<\/h4>\n
package date;\r\nimport java.io.ObjectStreamClass;\r\nimport java.util.Calendar;\r\npublic class days\r\n{\r\n  public static void main(String args[])\r\n  {\r\n    ObjectStreamClass osc = ObjectStreamClass.lookup(String.class);  \r\n    System.out.println(\"\" + osc.getField(\"value\"));  \r\n\r\n    ObjectStreamClass osc2 = ObjectStreamClass.lookup(Calendar.class);  \r\n    System.out.println(\"\" + osc2.getField(\"isTimeSet\"));  \r\n  }\r\n}<\/pre>\n
Output<\/strong>
\nValue
\nZ is Timeset<\/p>\n
Example<\/h4>\n
package student;\r\nimport java.io.ObjectStreamClass;\r\nimport java.io.ObjectStreamField;\r\nimport java.util.Calendar;\r\npublic class Std\r\n{\r\n  public static void main(String args[])\r\n  {\r\n    ObjectStreamClass osc = ObjectStreamClass.lookup(Integer.class);\r\n\r\n    ObjectStreamField field = osc.getField(\"value\");\r\n\r\n    System.out.println(\"\" + field.getName());\r\n\r\n    ObjectStreamClass osc2 = ObjectStreamClass.lookup(Calendar.class);\r\n\r\n    ObjectStreamField field2 = osc2.getField(\"Changed\");\r\n\r\n    System.out.println(\"\" + field2.getName());\r\n  }\r\n}<\/pre>\n
Output<\/strong>
\nValue
\nChanged<\/p>\n
Example<\/h4>\n
import java.io.ObjectStreamClass;   \r\n\r\nimport java.util.Calendar;   \r\npublic class ObjectStreamClassExample \r\n{   \r\n\r\n     public static void main(String[] args) \r\n\r\n     {   \r\n          ObjectStreamClass abc = ObjectStreamClass.lookup(String.class);   \r\n          System.out.println(\"\" + abc.getField(\"value\"));   \r\n\r\n          ObjectStreamClass abc2 = ObjectStreamClass.lookup(Calendar.class);   \r\n          System.out.println(\"\" + abc2.getField(\"isTimeSet\"));   \r\n\r\n       }   \r\n}<\/pre>\n
Output<\/strong>
\nI value
\nZ isTimeSet<\/p>\n
Conclusion<\/h3>\n
This class describes a Serializable field from a Serializable class. A class’s Serializable fields are declared using an array of ObjectStreamFields.<\/p>\n","protected":false},"excerpt":{"rendered":"
An explanation from a Serializable class regarding a Serializable field. A class’s Serializable fields are declared using an array of ObjectStreamFields. Explanation The Java Object Stream field class describes a serializable field from a...<\/p>\n","protected":false},"author":6,"featured_media":447242,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[183],"tags":[296,330,5684,263,327,250,5524,331],"class_list":["post-89835","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java","tag-java-objectstreamfield-class","tag-java-objectstreamfield-class-with-examples","tag-java-tutorial-for-beginners","tag-java-tutorials","tag-learn-java","tag-objectstreamfield-class","tag-objectstreamfield-class-in-java"],"yoast_head":"\nJava ObjectStreamField Class - TechVidvan<\/title>\n<meta name=\"description\" content=\"A description of a Serializable field from a Serializable class is found in the Java Object Stream field class.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/techvidvan.com\/tutorials\/java-objectstreamfield-class\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java ObjectStreamField Class - 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