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¡¶Java¾ÍÒµÅàѵ½Ì³Ì¡·P34Ô´Âë
³ÌÐòÇåµ¥£ºPromote.java
class Promote
{
 public static void main(String args[])
 {
  byte b = 50;
  char c = 'a';
  short s = 1024;
  int i = 50000;
  float f = 5.67f;
  double d = .1234;
  double result = (f * b) + (i / c) - (d * s);
  System.out.println((f * b) + " + " + (i / c) + " - " + (d * s));
  System.out.println("result = " + result);
 }
}
¡¶Java¾ÍÒµÅàѵ½Ì³Ì¡·P35Ô´Âë
³ÌÐòÇåµ¥£ºTestScope.java
public class TestScope
{
 public static void main(String[] args)
 {
  int x = 12;          
  {
   int q = 96;  // xºÍq¶¼¿ÉÓÃ
   System.out.println("x is "+x);
   System.out.println("q is "+q);
  }
        q = x;                 /* ´íÎóµÄÐУ¬Ö»ÓÐx¿ÉÓ㬠q ³¬³öÁË×÷ÓÃÓò·¶Î§ */
        System.out.println("x is "+x);     
 }
}
¡¶Java¾ÍÒµÅàѵ½Ì³Ì¡·P37Ô´Âë
³ÌÐòÇåµ¥£ºTestVar.java
public class TestVar
{
    public static void main(String [] args)
    {
        int x;//Ó¦¸ÄΪint x=0;
        x=x+1;   //Õâ¸öxÓÉÓÚûÓгõʼ»¯£¬±àÒë»á±¨´í¡£
        System.out.println("x is "+x);
 }
}
³ÌÐòÇåµ¥£ºFunc1.java
public class Func1
{
 public static void main(String [] args)
 {
 /* ÏÂÃæÊÇ´òÓ¡³öµÚÒ»¸ö¾ØÐεijÌÐò´úÂë*/
  for(int i=0;i<3;i++)
  {
   for(int j=0;j<5;j++)
   {
    System.out.print("*");
  &