java - 找不到包 java.nio.file

Question

我的 java 编译器找不到 java.nio.file 包。考虑:

import java.nio.file.*;
public class Test {
    public static void main(String[] args) { 
        Path currentRelativePath = Paths.get("");
    }
}

编译

bash$ javac Test.java

给予

Test.java:1: package java.nio.file does not exist
import java.nio.file.*;
                ^
Test.java:5: cannot find symbol
symbol  : class Path
location: class Test
    Path currentRelativePath = Paths.get("");
    ^
Test.java:5: cannot find symbol
symbol  : variable Paths
location: class Test
    Path currentRelativePath = Paths.get("");
                               ^
3 errors

我正在使用 Ubuntu 12.04，我想我已经安装了 JDK 7(参见:package java.nio.file does not exist)

bash$ java -version
java version "1.7.0_25"
OpenJDK Runtime Environment (IcedTea 2.3.10) (7u25-2.3.10-1ubuntu0.12.04.2)
OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)

Answer 1

完全有可能你有 java 1.7，但是 javac 1.6 甚至 1.5

也许你可以使用

sudo update-alternatives --config javac

配置它。如果你不能选择1.7，那么你需要升级你的JDK包。