java默认

默认Java的AES最大支持128bit的密钥，如果使用256bit的密钥，会抛出一个异常：java.security.InvalidKeyException:Illegal key size 其实Java官网上提供了解决方案，需要下载“Java Cryptography Extension(JCE)Unlimited Strength ...

Java默认使用的数据类型是什么?

java常见的开源算法支持以及java默认支持的provider

java6支持了很多的加密算法，各...这里我们可以看到jdkhome下的jre/lib/security/java.security默认的支持的算法 security.provider.1=sun.security.provider.Sun security.provider.2=sun.security.rsa.SunRsaSign security.provider.3=...

Java默认的构造方法的形式是什么样的？

Java默认类型，类型转换，常量与变量笔记

默认类型：在java里整数默认是int类型，小数默认是double类型，单个字符默认是char类型，true、false自然默认的是boolean类型，字符串默认的是String类型。变量和常量类型转换：因为有默认类型，在需要使用其他类型的时候就需要进行类型...

序列化之Java默认序列化技术(ObjectOutputStream与ObjectInputStream)

Java默认序列化技术主要是通过对象输出流java.io.ObjectOutputStream 对象输入流java.io.ObjectInputStream 来实现的 1 2 3 4 5 6 7 8 9 package com.xingej.ser;public interface ISerializer {/序列化，将obj序列化成字节数组 public...

简述Hessian序列化与java默认序列化的区别

在 Ubuntu 20.04 上设置默认 Java 版本

在 Ubuntu 20.04 上设置默认 Java 版本如果您的系统 Ubuntu 20.04 上安装了多个 Java 版本，那么您可以使用以下命令检查默认 Java 版本：$Java-version 现在，使用 update-alternatives 命令更改默认 Java 版本，如下所示：$sudo update-...

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