java类型

public class Example_1 {

	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;//导致精度的损失
		f = (float)d;//导致精度的损失
		System.out.println("b= "+b);
		System.out.println("f= "+f);
		

	}

}