properties.md

# Properties类

如果需要使用Properties类在控制台打印出JVM参数，下面的代码正确的是：

## 答案

```java

public void test() {
    Properties properties = System.getProperties();
    properties.list(System.out);
}
```

## 选项


### B

```java

public void test() {
    Properties properties = new Properties();
    properties.list(System.class);
}
```

### C

```java

public void test() {
    Properties properties = new Properties();
    properties.print(System.out);
}
```

### D

所有都不是