JDK1.4/JDK5/JDK6/JDK7 的官方下载地址
如果你像我一样总是在Oracel的破网站上晕头转向找不到旧版本JDK的话，那你来对了地方
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jdk1.4:
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase14-419411.html
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jdk5:
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase5-419410.html
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jdk6:
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase6-419409.html
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jdk7:
http://www.oracle.com/technetwork/java/javase/downloads/index.html
