converttest.java

还不错的java基本实例

import javax.swing.JOptionPane;
public class ConvertTest {
    public static void main( String args[] )
   {
        float a=2.8F;
        short x = 5, y = 12;
                byte x1 = 10, y1 = 20;
              //  short z = x + y;   // 错误：无法将类型“int”隐式转换为“short
               // byte z1 = x1 + y1; // 错误: 无法将类型“int”隐式转换为“byte”
                short z =(short)(x+y);
                byte z1 =(byte)( x1 + y1);
                int m = x + y;
                long n = x + y;
                double b=a+x;
           String output="x="+x+"      y="+y+"      z="+z+"      m="+m+"      n=" +n+"\n"+
             "x1="+x1+"      y1="+y1+"      z1="+z1+"\n" +
             "a="+a+"      b="+b;
        JOptionPane.showMessageDialog(null,output);
             System.exit(0);
    }
}