app.md

# Java 程序的基本结构

以下选项中，有语法错误的是：

## 答案

```java
public App {
    public static main(String[] args){
        for(int i=0; i<10; i++){
            System.out.println(i);
        }
    }
}

```

## 选项

### A

```java
public class App {
    public static void main(String[] args){
        for(int i=0; i<10; i++){
            System.out.println(i);
        }
    }
}

```

### B

```java
public class App {
    public static void main(String[] args){
        for(int i=0; i<10; i++){
            System.out.println(i);
        }
    }
}

```

### C

```java
public class App {
    public static int sum(int[] array){
        int a = 0;
        for(int i=0; i<array.length; i++){
            a += array[i];
        }
        return a;
    }
}
```

### D

```java
public class App {
    public int sum(int[] array){
        int a = 0;
        for(int i=0; i<array.length; i++){
            a += array[i];
        }
        return a;
    }
}
```

### E

```java
public interface App {
    default int sum(int[] array){
        int a = 0;
        for(int i=0; i<array.length; i++){
            a += array[i];
        }
        return a;
    }
}
```