What is the purpose of declaring a class as Java-Bean in MANIFEST.MF file?
0
When I open MANIFEST.MF file of rt.jar, I can find classes from swing package are declared as java beans. What is the difference between these classes and normal java classes?
MANIFEST.MF file:
Manifest-Version: 1.0
Implementation-Vendor: Oracle Corporation
Implementation-Title: Java Runtime Environment
Implementation-Version: 1.8.0_191
Specification-Vendor: Oracle Corporation
Created-By: 1.7.0_07 (Oracle Corporation)
Specification-Title: Java Platform API Specification
Specification-Version: 1.8
Name: javax/swing/JCheckBoxMenuItem.class
Java-Bean: True
Name: javax/swing/JDialog.class
Java-Bean: True
Name: javax/swing/JSlider.class
Java-Bean: True
Name: javax/swing/JTextField.class
Java-Bean: True
Name: javax/swing/JTextPane.class
Java-Bean: True
Name: javax/swing/JTextArea.class
Java-Bean: True
Name: javax/swing/JList.class
Java-Bean: True
Name: javax/swing/JFormattedTextField.class
Java-Bean: True
java javabeans meta-inf rt.jar
edited Nov 24 '18 at 15:21
Gayan Mettananda
1,112713
asked Nov 24 '18 at 15:11
Anoop DeshpandeAnoop Deshpande
295
add a comment |
0
When I open MANIFEST.MF file of rt.jar, I can find classes from swing package are declared as java beans. What is the difference between these classes and normal java classes?
MANIFEST.MF file:
Manifest-Version: 1.0
Implementation-Vendor: Oracle Corporation
Implementation-Title: Java Runtime Environment
Implementation-Version: 1.8.0_191
Specification-Vendor: Oracle Corporation
Created-By: 1.7.0_07 (Oracle Corporation)
Specification-Title: Java Platform API Specification
Specification-Version: 1.8
Name: javax/swing/JCheckBoxMenuItem.class
Java-Bean: True
Name: javax/swing/JDialog.class
Java-Bean: True
Name: javax/swing/JSlider.class
Java-Bean: True
Name: javax/swing/JTextField.class
Java-Bean: True
Name: javax/swing/JTextPane.class
Java-Bean: True
Name: javax/swing/JTextArea.class
Java-Bean: True
Name: javax/swing/JList.class
Java-Bean: True
Name: javax/swing/JFormattedTextField.class
Java-Bean: True
java javabeans meta-inf rt.jar
edited Nov 24 '18 at 15:21
Gayan Mettananda
1,112713
asked Nov 24 '18 at 15:11
Anoop DeshpandeAnoop Deshpande
295
It’s part of the JavaBeans specification. Considering how old that specification is, it probably was intended to facilitate faster loading of classes. In the 90s, reading a jar file was a noticeably slow operation.
– VGR
Nov 24 '18 at 16:45
add a comment |
0
0
0
When I open MANIFEST.MF file of rt.jar, I can find classes from swing package are declared as java beans. What is the difference between these classes and normal java classes?
MANIFEST.MF file:
Manifest-Version: 1.0
Implementation-Vendor: Oracle Corporation
Implementation-Title: Java Runtime Environment
Implementation-Version: 1.8.0_191
Specification-Vendor: Oracle Corporation
Created-By: 1.7.0_07 (Oracle Corporation)
Specification-Title: Java Platform API Specification
Specification-Version: 1.8
Name: javax/swing/JCheckBoxMenuItem.class
Java-Bean: True
Name: javax/swing/JDialog.class
Java-Bean: True
Name: javax/swing/JSlider.class
Java-Bean: True
Name: javax/swing/JTextField.class
Java-Bean: True
Name: javax/swing/JTextPane.class
Java-Bean: True
Name: javax/swing/JTextArea.class
Java-Bean: True
Name: javax/swing/JList.class
Java-Bean: True
Name: javax/swing/JFormattedTextField.class
Java-Bean: True
java javabeans meta-inf rt.jar
edited Nov 24 '18 at 15:21
Gayan Mettananda
1,112713
asked Nov 24 '18 at 15:11
Anoop DeshpandeAnoop Deshpande
295
When I open MANIFEST.MF file of rt.jar, I can find classes from swing package are declared as java beans. What is the difference between these classes and normal java classes?
MANIFEST.MF file:
Manifest-Version: 1.0
Implementation-Vendor: Oracle Corporation
Implementation-Title: Java Runtime Environment
Implementation-Version: 1.8.0_191
Specification-Vendor: Oracle Corporation
Created-By: 1.7.0_07 (Oracle Corporation)
Specification-Title: Java Platform API Specification
Specification-Version: 1.8
Name: javax/swing/JCheckBoxMenuItem.class
Java-Bean: True
Name: javax/swing/JDialog.class
Java-Bean: True
Name: javax/swing/JSlider.class
Java-Bean: True
Name: javax/swing/JTextField.class
Java-Bean: True
Name: javax/swing/JTextPane.class
Java-Bean: True
Name: javax/swing/JTextArea.class
Java-Bean: True
Name: javax/swing/JList.class
Java-Bean: True
Name: javax/swing/JFormattedTextField.class
Java-Bean: True
java javabeans meta-inf rt.jar
java javabeans meta-inf rt.jar
edited Nov 24 '18 at 15:21
Gayan Mettananda
1,112713
asked Nov 24 '18 at 15:11
Anoop DeshpandeAnoop Deshpande
295
edited Nov 24 '18 at 15:21
Gayan Mettananda
1,112713
asked Nov 24 '18 at 15:11
Anoop DeshpandeAnoop Deshpande
295
edited Nov 24 '18 at 15:21
Gayan Mettananda
1,112713
edited Nov 24 '18 at 15:21
Gayan Mettananda
1,112713
edited Nov 24 '18 at 15:21
Gayan Mettananda
1,112713
1,112713
asked Nov 24 '18 at 15:11
Anoop DeshpandeAnoop Deshpande
295
asked Nov 24 '18 at 15:11
Anoop DeshpandeAnoop Deshpande
295
asked Nov 24 '18 at 15:11
Anoop DeshpandeAnoop Deshpande
295
295
It’s part of the JavaBeans specification. Considering how old that specification is, it probably was intended to facilitate faster loading of classes. In the 90s, reading a jar file was a noticeably slow operation.
– VGR
Nov 24 '18 at 16:45
add a comment |
It’s part of the JavaBeans specification. Considering how old that specification is, it probably was intended to facilitate faster loading of classes. In the 90s, reading a jar file was a noticeably slow operation.
– VGR
Nov 24 '18 at 16:45
It’s part of the JavaBeans specification. Considering how old that specification is, it probably was intended to facilitate faster loading of classes. In the 90s, reading a jar file was a noticeably slow operation.
– VGR
Nov 24 '18 at 16:45
It’s part of the JavaBeans specification. Considering how old that specification is, it probably was intended to facilitate faster loading of classes. In the 90s, reading a jar file was a noticeably slow operation.
– VGR
Nov 24 '18 at 16:45
add a comment |
0
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It’s part of the JavaBeans specification. Considering how old that specification is, it probably was intended to facilitate faster loading of classes. In the 90s, reading a jar file was a noticeably slow operation.
– VGR
Nov 24 '18 at 16:45