接口中声明一个长度为100的字符串数组food 再定义一个类为字符串批量赋值food= "大米","薄荷","蟹黄堡","海霸棒","棒棒糖","猪肉","千层面","巧克力","香肠","骨头","奶酪","辣椒","海螺","鸡蛋"
时间: 2023-10-27 17:06:57 浏览: 70
在Java接口中声明一个长度为100的字符串数组food可以这样写:
```
public interface FoodInterface {
String[] food = new String[100];
}
```
然后在定义一个类来批量赋值,可以这样写:
```
public class Food implements FoodInterface {
static {
food[0] = "大米";
food[1] = "薄荷";
food[2] = "蟹黄堡";
food[3] = "海霸棒";
food[4] = "棒棒糖";
food[5] = "猪肉";
food[6] = "千层面";
food[7] = "巧克力";
food[8] = "香肠";
food[9] = "骨头"; food[10] = "奶酪";
food[11] = "辣椒";
food[12] = "海螺";
food[13] = "鸡蛋";
}
}
```
这样就可以在其他类中通过接口来访问这个字符串数组了。
相关问题
58.定义一个Cat类,拥有food属性和behavior0方法,food的默认值为‘fish',behavior0方法中打印 输出'sleep'.
在Java中定义一个Cat类,可以如下所示:
```java
public class Cat {
// 定义一个属性food,默认值为'fish'
private String food = "fish";
// 定义一个方法behavior0,该方法打印输出'sleep'
public void behavior0() {
System.out.println("sleep");
}
// 如果需要获取或设置food属性的值,可以定义相应的getter和setter方法
public String getFood() {
return food;
}
public void setFood(String food) {
this.food = food;
}
}
```
在上述代码中,Cat类有一个私有属性`food`,并且通过构造方法或者初始化块给`food`赋予了默认值`"fish"`。同时,类中定义了一个`behavior0`方法,当调用这个方法时,它会在控制台输出字符串`"sleep"`。
如果需要,还可以为`food`属性提供getter和setter方法,以便在类的外部访问和修改这个属性的值。
已知字符串数组{"the","quick","brown","fox","jumps","for","food"}, 使用查询表达式筛选其中长度为3、首字母为f的数组元素。
可以使用 LINQ 查询表达式筛选出符合条件的字符串数组元素。代码如下:
```csharp
string[] words = {"the","quick","brown","fox","jumps","for","food"};
var result = from word in words
where word.Length == 3 && word.StartsWith("f")
select word;
```
其中,`from word in words` 表示对字符串数组进行遍历,`where` 子句表示筛选条件,`select` 子句表示返回的结果。筛选条件为字符串长度等于3且首字母为f,返回的结果为符合条件的字符串数组元素。