以下程序的输出结果为 ( ) 。 public class ex2_2 { public static void main (String args[ ] ) { int x , y ; byte b = 6; float z = 1.234f ; double w = 1.23; boolean flag; x = 12 ; y = 300; flag=x>y; System.out.println("x>y=="+flag); flag=z>w; System.out.println("z>w=="+flag); } }