如何使用Java确定Windows的32位或64位架构？

java -d64 -version

java version "1.8.0_XXX"
Java(TM) SE Runtime Environment (build 1.8.0_XXX-bXX)
Java HotSpot(TM) 64-Bit Server VM (build 25.71-bXX, mixed mode)

java version "1.8.0_XXX"
Java(TM) SE Runtime Environment (build 1.8.0_XXX-bXX)
Java HotSpot(TM) Client VM (build 25.71-bXX, mixed mode, sharing)

public class ArchitectureChecker {
    public static void main(String[] args) {
        String arch = System.getProperty("os.arch");
        if (arch.equals("amd64") || arch.equals("x86_64")) {
            System.out.println("64-bit architecture");
        } else {
            System.out.println("32-bit architecture");
        }
    }
}

javac ArchitectureChecker.java
java ArchitectureChecker