转换数据的基本类型int >byte

public class Example2_2 {

	public static void main(String[] args) {
		byte b=22;
		int n=129;
		float f=123456.6789f;
		double d=123456789.123456789;
		System.out.println("b= "+b);
		System.out.println("n= "+n);
		System.out.println("f= "+f);
		System.out.println("d= "+d);
		b =(byte)n;
		f=(float)d;
		System.out.println("b= "+b);
		System.out.println("f= "+f);
		
	}

}