java1.8学习demo

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大牛的源码：http://git.oschina.net/benhail/javase8-sample

大牛的博客：http://my.oschina.net/benhaile/blog

下面是我在学习过程中综合网上写的一些demo

import javax.script.ScriptEngine;import javax.script.ScriptEngineManager;import javax.script.ScriptException;public class JavaScriptTest {    public static void  main(String[] args){        ScriptEngineManager manager = new ScriptEngineManager();        ScriptEngine engine = manager.getEngineByName( "JavaScript" );//manager.getEngineByName("nashorn");效果是一样的        System.out.println( engine.getClass().getName() );//jdk.nashorn.api.scripting.NashornScriptEngine        try {            System.out.println( "Result:" + engine.eval( "function f() { return 1; }; f() + 1;" ) );//Result:2.0        } catch (ScriptException e) {            e.printStackTrace();        }    }}

//集成了Base64import java.io.UnsupportedEncodingException;import java.nio.charset.StandardCharsets;import java.util.Base64;import java.util.UUID;public class Base64Test {    public static void main(String[] args) {        //basic 编码        final String text = "Base64 finally in Java 8!";        System.out.println("base64 basic text："+ text);        final String encoded = Base64.getEncoder().encodeToString(text.getBytes(StandardCharsets.UTF_8));        System.out.println("base64 basic encode result："+ encoded );        final String decoded = new String(Base64.getDecoder().decode(encoded),StandardCharsets.UTF_8);        System.out.println("base64 basic decode result："+decoded);        //url编码        try {            String url="subjects?abcd";            System.out.println("base64 url text: " + url);            String urlEncoded = Base64.getUrlEncoder().encodeToString(url.getBytes("utf-8"));            System.out.println("base64 url encode result: " + urlEncoded);            String urlDecoded=new String(Base64.getUrlDecoder().decode(urlEncoded),StandardCharsets.UTF_8);            System.out.println("base64 url decode result: " + urlDecoded);        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }        //mime编码,使用基本的字母数字产生BASE64输出，每一行输出不超过76个字符，而且每行以“\r\n”符结束        try {            StringBuilder sb = new StringBuilder();            for (int t = 0; t < 10; ++t) {                sb.append(UUID.randomUUID().toString());            }            System.out.println("base64 mime text: " + sb.toString());            String mimeEncoded = Base64.getMimeEncoder().encodeToString(sb.toString().getBytes("utf-8"));            System.out.println("base64 mime encode result: " + mimeEncoded);            String mimeDecoded=new String(Base64.getMimeDecoder().decode(mimeEncoded),StandardCharsets.UTF_8);            System.out.println("base64 mime decode result: " + mimeDecoded);        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        }    }}

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