Practice Note eclipse +

the Test class {public
    public static void main (String [] args) {
     //System.out.println("hello word1111 ");
     // int I = 0;
     // = I. 1;
     // int K = 10;
     / / I = K;
     
     // S = Short. 9;
     // Short S0 =. 11;
     // S = S0;
     
     // int RES = I = S = B; //
     // in the calculation process, wherein the integer type numbers data operation, he was converted to the corresponding value of the ASCII code and then calculates
     
     // byte B0 = 2;
     
     // int + K C = B0;
     //System.out.println(k);
     
  // String STR = "ABC";
 
  // I = int. 1;
 
  // string Str0 = "" 2 + + +. 1. 3;
  // when the type of any values and character strings substantially continuous operation (+), the value of the basic types of automatically converted to a string type
  //System.out.println(str0);
  //System.out.println(3. 4 + + "the Hello");
 
  // Note: when + current operations of some of the columns, if a section contains a string, the string is next to the front, is to begin to see the follow string concatenation
  // String str1 = 1 + 3 + +. 5 "a" + + 2. 6;
  //System.out.println(str1); 
 
 
  // byte B =. 9;
  // int m = B;
  above two rows // implicit conversion is normal, automatic
  // K =. 7 int;
  // byte B0 = (byte) K; // this is cast data types, data type conversion use English small brackets
 
 
  // int I0 = -3;
   
  //System.out. the println (-i0);
 
 // System.out.println (. 1 + 2);
  // when the integer by an integer when the fractional part of the result is discarded, the pictures will not discard the fractional addition
  //System.out.println (. 7/2);
 
  // int I = 0;
  // int K = I ++;
  // int K = I ++;
  // increment decrement. Before the variable, after the first calculation value
  // after the variable, the dereferencing operator
  //System.out.println(k);
  //system.out.println(i);
  // String STR = "H" + "e" + "llo"; // plus the string is the string concatenation
  //System.out.println(str);
     
  //System.out.println(-5% 2);
   
   
  // char data type of mathematical operations that can be done, when doing the math character ASCII code conversions calculation
  //System.out.println('* '+' \ T '+' * ');
   
   
  // string other types of digital sum is actually converted to the other data strings, the character do splicing string
  //System.out.println("* "+ '\ T' + '*');
     
// I = int. 1;
// Short S = 2;
// I = S; // automatic conversion
/ / s = (short) i; // cast
//  
// int I0 = 0;
// int I1 = 0;
// int I2 = 0;
//
// I0 = I1 = I2 =. 1; // = may be continuously assigned
//  
// System.out.println (I0 + "," + I1 + "," + I2);  
     
     int I =. 1;
// I = I + 2;
     
     I = + 2;
     the System.out. println (i);
     
     String str = "he";
     
     str + = "llo"; // + = string is the string concatenation
     System.out.println (STR);
     
     Short S = 2;
     
     S = (Short) (S +. 3); // time involved in computing the variable , Java program does not know the specific operation done after this variable will re-check the current variable scope,
                        // it will be put into a larger variable length, in this example, short integer data is a short , the default will be converted int
     
     S + =. 3; // when using the extended assignment operators, variables will result in automatic calculation participation coerced to the current variable type
     
     
    }
}