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我们在查看JDK源码时#xff0c;可能会遇到这种情况#xff0c;步入底层查看JDK源码时#xff0c;出现一堆var变量#xff0c;可读性非常之差#xff0c;例如笔者最近想看到nio包下的SocketChannelImpl的write方法#xff0c;结果看到这样一番景象#xff1a;
pu…问题
我们在查看JDK源码时可能会遇到这种情况步入底层查看JDK源码时出现一堆var变量可读性非常之差例如笔者最近想看到nio包下的SocketChannelImpl的write方法结果看到这样一番景象
public int write(ByteBuffer var1) throws IOException {if (var1 null) {throw new NullPointerException();} else {Object var2 this.writeLock;synchronized(this.writeLock) {this.ensureWriteOpen();int var3 0;boolean var20 false;byte var5;label310: {int var27;try {var20 true;this.begin();Object var4 this.stateLock;synchronized(this.stateLock) {if (!this.isOpen()) {var5 0;var20 false;break label310;}this.writerThread NativeThread.current();}do {var3 IOUtil.write(this.fd, var1, -1L, nd);} while(var3 -3 this.isOpen());var27 IOStatus.normalize(var3);var20 false;} finally {if (var20) {this.writerCleanup();this.end(var3 0 || var3 -2);Object var11 this.stateLock;synchronized(this.stateLock) {if (var3 0 !this.isOutputOpen) {throw new AsynchronousCloseException();}}assert IOStatus.check(var3);}}this.writerCleanup();this.end(var3 0 || var3 -2);Object var28 this.stateLock;synchronized(this.stateLock) {if (var3 0 !this.isOutputOpen) {throw new AsynchronousCloseException();}}assert IOStatus.check(var3);return var27;}this.writerCleanup();this.end(var3 0 || var3 -2);Object var6 this.stateLock;synchronized(this.stateLock) {if (var3 0 !this.isOutputOpen) {throw new AsynchronousCloseException();}}assert IOStatus.check(var3);return var5;}}}所以本文就带大家演示如何添加OpenJDK的zip包确保可以阅读到源码。
配置步骤
下载OpenJDK的zip包
首先我们步入官网地址:https://hg.openjdk.org/然后选择所需的JDK版本进行下载以笔者为例选择JDK8 然后选择JDK进入下一个界面 直接点击zip即可开始下载 完成卸载后我们会得到这样一个zip包。 添加到IDEA中
基于IDEA查看我们要查看源码的项目点击Project Structure选择Sourcepath点击添加将刚刚的zip包添加进来。 随后会弹出这样一个页面要我们选择需要导入的classes笔者这里直接选择全部 测试
随后我们再次查看对应源码所有的变量都语义化了
public int write(ByteBuffer buf) throws IOException {if (buf null)throw new NullPointerException();synchronized (writeLock) {ensureWriteOpen();int n 0;try {begin();synchronized (stateLock) {if (!isOpen())return 0;writerThread NativeThread.current();}for (;;) {n IOUtil.write(fd, buf, -1, nd);if ((n IOStatus.INTERRUPTED) isOpen())continue;return IOStatus.normalize(n);}} finally {writerCleanup();end(n 0 || (n IOStatus.UNAVAILABLE));synchronized (stateLock) {if ((n 0) (!isOutputOpen))throw new AsynchronousCloseException();}assert IOStatus.check(n);}}}参考
idea查看 rt.jar源码:https://blog.csdn.net/yangyangrenren/article/details/117554745
