Package isSealed(URL) method in Java with Examples
Last Updated :
05 Jun, 2021
The isSealed(URL) method of java.lang.Package class is used to check if this package is sealed or not, with respect to the specified URL. The method returns the result as a boolean value.
Syntax:
public boolean isSealed(URL url)
Parameter: This method does not accept any parameter.
Return Value: This method returns the result as a boolean value.
Below programs demonstrate the isSealed(URL) method.
Example 1:
Java
import java.net.*;
public class Test {
public static void main(String[] args)
throws MalformedURLException
{
Package myPackage
= Package.getPackage( "java.lang" );
System.out.println(
"Package represented by myPackage: "
+ myPackage.toString());
URL url
System.out.println(
"Is this package sealed or not: "
+ myPackage.isSealed(url));
}
}
|
Output:
Package represented by myPackage: package java.lang, Java Platform API Specification, version 1.8
Is this package sealed or not: false
Example 2:
Java
import java.net.*;
public class Test {
public static void main(String[] args)
throws MalformedURLException
{
Package myPackage
= Package.getPackage( "java.io" );
System.out.println(
"Package represented by myPackage: "
+ myPackage.toString());
URL url
System.out.println(
"Is this package sealed or not: "
+ myPackage.isSealed(url));
}
}
|
Output:
Package represented by myPackage: package java.io, Java Platform API Specification, version 1.8
Is this package sealed or not: false
Reference: https://docs.oracle.com/javase/9/docs/api/java/lang/Package.html#isSealed–
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