检测 Java 是否运行在64bit 的JVM上，64bitjvm, public s

检测 Java 是否运行在64bit 的JVM上，64bitjvm, public s

    public static boolean is64BitVM() {        String bits = System.getProperty("sun.arch.data.model");        if (bits != null) {           return bits.equals("64");        } else {           // probably sun.arch.data.model isn't available           // maybe not a Sun JVM?           // try with the vm.name property           return System.getProperty("java.vm.name").contains("64");        }       }