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which versions of ssl and tls can we use for java 1.2


which versions of ssl and tls can we use for java 1.2

By : Noaman Ilyas
Date : November 23 2020, 03:01 PM
like below fixes the issue The Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols is integrated from java 1.4. I would like to know which SSL/TLS versions can be used with java 1.2. ,
Which versions of ssl and tls can we use for java 1.2
code :


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Which versions of Android SDK support coding in which versions of Java?

Which versions of Android SDK support coding in which versions of Java?


By : Petr Zalud
Date : March 29 2020, 07:55 AM
it should still fix some issue You are trying to look at Android as a subset of Java which it is not. They are completely separated. Even though Android comes from Java, it as departed from it quite a bit and there is no correlation 'version-wise' anymore between the two.
What you can look at is the Android documentation. For every instruction/command/method/properties, at the top right you'll find the api level at which you are able to access said property.
Can newer JRE versions run Java programs compiled with older JDK versions?

Can newer JRE versions run Java programs compiled with older JDK versions?


By : Chris Homere
Date : March 29 2020, 07:55 AM
around this issue You would not encounter any problems - that's the magic of Java -it's backwards compatible.You can run almost all code from Java 1 on Java 8. There's no reason why Java 6 code won't run on a Java 8 Runtime.
What is interesting, is that for applications written in, let's say, Java 1.4, you even have speed increases when running them on later runtimes. This is because Java is constantly evolving, not just the language known as "Java", but also the JVM (Java virtual machine). I still have source code from more than 10 years ago that still work, as expected in the latest JVM.
Java EE Application Servers and JDK versions need to match certified versions?

Java EE Application Servers and JDK versions need to match certified versions?


By : harshshah4
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further your main argument should be that java 6 has been EOL'ed by Oracle and will not be getting any new (freely available) security updates. should you ship a jdk-6-based product some of your customers will definitely complain about it (i know some of the customers of the company i work for routinely scan products they buy and install and notify vendors of any EOL'ed or known-to-be-insecure versions in use).
How to load two versions of a class from two different versions of jars in a java maven project?

How to load two versions of a class from two different versions of jars in a java maven project?


By : profistart.com
Date : March 29 2020, 07:55 AM
Hope this helps The reason it is loading the class from the dependent jar is because the loader1 class loader gets the current Thread's context class loader as its parent class loader and that class loader loads classes from the dependent jar. The public ClassLoader.loadClass(String) method calls into the protected ClassLoader.loadClass(String, boolean) method and that method is documented to explain that the parent class loader is always searched first. You can, of course, override this behavior by subclassing URLClassLoader and overriding the loadClass(String, boolean) method.
org.sample.SampleEnum from sample-1.0.jar
code :
public enum SampleEnum
{
    HERBIVORES,
    CARNIVORES
}
public enum SampleEnum
{
    HERBIVORES,
    CARNIVORES,
    OMNIVORES
}
package com.example.app;

import org.sample.SampleEnum;
import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;

import static java.util.Arrays.asList;

public class Main
{
    public static void main(String[] args)
    {
        System.out.println("v2.0: " + asList(SampleEnum.values()));
        try {
            URLClassLoader loader1 = new CustomURLClassLoader(
                    new URL[] { new File("../sample-1.0/target/sample-1.0.jar").toURL() });

            Class<?> c1 = loader1.loadClass("org.sample.SampleEnum");

            System.out.println("v1.0: " + asList(c1.getEnumConstants()));
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

class CustomURLClassLoader extends URLClassLoader
{
    public CustomURLClassLoader(URL[] urls)
    {
        super(urls);
    }

    protected Class<?> loadClass(String name, boolean resolve)
            throws ClassNotFoundException
    {
        synchronized (getClassLoadingLock(name)) {
            // First, check if the class has already been loaded
            Class<?> c = findLoadedClass(name);
            if (c == null) {
                long t0 = System.nanoTime();

                // First, look in the current ClassLoader
                long t1 = System.nanoTime();
                try {
                    c = findClass(name);
                } catch (ClassNotFoundException ex) {
                    // ClassNotFoundException thrown if class not found
                }

                // this is the defining class loader; record the stats
                sun.misc.PerfCounter.getParentDelegationTime().addTime(t1 - t0);
                sun.misc.PerfCounter.getFindClassTime().addElapsedTimeFrom(t1);
                sun.misc.PerfCounter.getFindClasses().increment();

                // Lastly, look in the parent ClassLoader
                try {
                    if (getParent() != null) {
                        c = super.loadClass(name, resolve);
                    }
                } catch (ClassNotFoundException e) {
                    // ClassNotFoundException thrown if class not found
                    // from the non-null parent class loader
                }

            }
            if (resolve) {
                resolveClass(c);
            }
            return c;
        }
    }
}
$ java -cp sample-app-2.0.jar:sample-2.0.jar com.example.app.Main
v2.0: [HERBIVORES, CARNIVORES, OMNIVORES]
v1.0: [HERBIVORES, CARNIVORES]
How to fix Java file versions and compile versions are different in VSCode

How to fix Java file versions and compile versions are different in VSCode


By : ArK
Date : March 29 2020, 07:55 AM
Does that help Uninstall jdk8 clean (Link) Install jdk11 (Link) Add "vmArgs": "--enable-preview" in launch.json F1, "Java: Clean the Java language server workspace" and "Java: Force Java Compilation" Run standalone file again
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