
class Count { |
public static int counter; |
static {//只运行一次 |
counter |
= 123; |
System.out.println("Now in static block."); |
|
|
} |
public void test(){ |
System.out.println("test method=="+counter); |
} |
} |
public class Test { |
public static void main(String args[]) { |
System.out.println("counter=" + Count.counter); |
new Count().test(); |
} |
} |
运行结果是: |
Now in static block. |
counter=123 |
test method==123 |
5:静态 import |
当我们要获取一个随机数时,写法是: |
public class Test { |
public static void main(String[] args) { |
double randomNum = Math.random(); |
System.out.println("the randomNum=="+randomNum); |
} |
}//源代码片段来自云代码http://yuncode.net |
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