JavaHome.java

public class JavaHome {
    
    public static void main(String[] args) {
        
        String home = System.getProperty("user.home");
        System.out.printf("%s\n", home);
    }
}

TestSSH.java

import java.io.File;

public class TeatSSH {
	
	public static void main(String[] args) {
		File dir = new File(System.getProperty("user.home") + File.separator + ".ssh");
		//System.out.println(dir.toString());
		
		if (dir.exists()) {
			System.out.println(dir.getAbsolutePath());
		}
		else {
			System.out.println("No such file");
		}
	}
}