数据类型代码练习

public class DataTypeDemo{	
    public static void main(String[] args){		
        //byte a = 128;  错误				   
        //short b = 32768; 错误				
        //int a = 3111111111; 错误				
        //long a = 3111111111L;				
        /*float f1 = 3.3452321123123f;		
      float f2 = 3.345232112312321321f;		  
      System.out.println(f1 == f2);				//字符类型		
      char a = 'B';		
      System.out.println(a == 66);		//字符串类型，一个字符序列		
      //String A = "AB";		
      //System.out.println(A);				
      char ch1 = 't';//转义符		
      System.out.println("[" + ch1 +  "]");		
      char ch2 = 'u0009';
      //转义符		
      System.out.println("[" + ch2 +  "]");				
      System.out.println(""abc"");				
      int a1 = 10;		
      boolean flag = true;		
      System.out.println((a1 == 10) == flag);					
      }
  }