java 7 新增数值类型写法

package frank;
public class App
{
	public static void main(String[] args)
	{
		//java 7新增的写法
		int binVal = 0B1000_0000_0000_0000_0000_0000_0000_0011;
		double pi = 3.14_15_92;
		int a = 8_5_1;
		float b = 3_2.5_4F;
		System.out.println(binVal);
		System.out.println(pi);
	}
}