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借读《Java核心技术-卷I》的机会,对Java知识体系进行梳理,写博进行记录。
Eclipse:https://eclipse.org/downloads/
JDK:http://www.oracle.com/technetwork/java/javase/downloads/index.html
注意eclipse-inst需要用管理员模式运行,否则安装文件无法正常下载。
参考:http://stackoverflow.com/questions/32637399/error-installing-eclipse-ide-on-windows
编写一段代码进行调试
1 public class HelloWorld 2 { 3 public void main() 4 { 5 System.out.println("Hello World"); 6 } 7 }
编译报错"Registry key Error: Java version has value ‘1.8‘, but ‘1.7‘ is required"
delete java.exe, javaw.exe and javaws.exe from Windows\System32 问题解决
参考:http://stackoverflow.com/questions/29697543/registry-key-error-java-version-has-value-1-8-but-1-7-is-required
http://stackoverflow.com/questions/26324486/properly-installing-java-8-along-with-java-7
之后编译报错"错误: 在类 HelloWorld 中找不到主方法, 请将主方法定义为:public static void main(String[] args)"
代码修改为
1 public class HelloWorld 2 { 3 public static void main(String[] args) 4 { 5 System.out.println("Hello World"); 6 } 7 }
问题解决
存疑:为什么main一定要写成 public static void main(String[] args)
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原文地址:http://www.cnblogs.com/issacpan/p/5495240.html