Linux 中的 JAVA_HOME 目录

探索Linux中的JAVA_HOME目录

bash
sudo update-alternatives --config java

bash
export JAVA_HOME=/path/to/your/java
export PATH=$PATH:$JAVA_HOME/bin

bash
source ~/.bashrc   # 或 source ~/.bash_profile

java
public class JavaHomeExample {
    public static void main(String[] args) {
        String javaHome = System.getenv("JAVA_HOME");
        if (javaHome != null) {
            System.out.println("Java is installed at: " + javaHome);
        } else {
            System.out.println("JAVA_HOME is not set. Please set it to the Java installation directory.");
        }
    }
}