"Java Fundamentals" "Lesson Three" expressions, control structures

Look at the agile development process for two days, am I an agile blogger? Haha o (∩_∩) o

1  Packagea.b;2 3  Public classthree4 {5     Static voidExpression ()6     {7System.out.println ("One, basic expression of learning");8         9         //Mathematical ExpressionsTenSYSTEM.OUT.PRINTLN (1 + 2);//addition OneSystem.out.println (4-3.2);//Subtraction ASYSTEM.OUT.PRINTLN (7 * 1.5);//multiplication -System.out.println (29/7);//Division -System.out.println (29%7);//Seeking Redundancy the          -         //Relational Expressions -System.out.println (6 > 4.2);//Greater than -SYSTEM.OUT.PRINTLN (3.4 >= 3.4);//greater than or equal +SYSTEM.OUT.PRINTLN (1.5 < 9);//less than -SYSTEM.OUT.PRINTLN (6 <= 1);//less than or equal +SYSTEM.OUT.PRINTLN (2 = = 2);//equals ASYSTEM.OUT.PRINTLN (2! = 2);//Not equal to at  -         /*     - some of the other expressions - true && false and - (3 > 1) | | (2 = = 1) or - !true not in   - //bit arithmetic to & and +         | or - ^ xor the ~ Not * 5 << 3 0b101 left shift 3 bits $ 6 >> 1 0b110 right shift 1 bitPanax Notoginseng  - m++ variable m plus 1 the n--variable n minus 1 + condition? x1:x2 condition is a Boolean value. According to condition, take the value of X1 or X2 A         */ the     } +      -     Static voidcontrolstructure () $     { $System.out.println ("Second, learning control structure"); -          -         intA = 0; the          -         //SELECT statementWuyi         if(A = = 1)  the         { -SYSTEM.OUT.PRINTLN ("Learn if statement if"); Wu         } -         Else if(A = = 0)  About         { $SYSTEM.OUT.PRINTLN ("Learn if statement else if"); -         } -         Else  -         { ASYSTEM.OUT.PRINTLN ("Learn if statement else")); +         } the          -         //Looping Statements $          while(a<3) the         {     theSystem.out.println ("Learning while statement" +a); thea++; the         } -          in          Do the         { theSystem.out.println ("Learning do While statement" +a); Abouta++; the} while(a<6); the          the         //use break to jump out of a loop, use continue to go directly to the next loop +          for(inti = 0; I < 5; i++) -         { the             if(i = = 1)Bayi             { the                 Continue;  the             } -             if(i = = 4 )  -             { the                  Break; the             } theSYSTEM.OUT.PRINTLN ("Learn for statement" +i); the         } -          the         //SELECT statement the         Charc = ' B '; the         Switch(c)94         { the          Case' A ': System.out.println ("Learning swithch statement" +c); Break; the          Case' B ': System.out.println ("Learning swithch statement" +c); Break; the          Case' C ': System.out.println ("Learning swithch statement" +c); Break;98         default: System.out.println ("Learning swithch statement default"); Break; About         } -     }101     102     103      Public Static voidMain (string[] args)104     { the         //learn the basic expressions106 Expression ();107         108         //Learning Control Structure109 controlstructure (); the     }111  the}

The results of the operation are as follows:

First, learning the basic expression 30.799999999999999810.541truetruetruefalsetruefalse Ii. learning control Structure Learning if statement else if Learning While Statement 0 learning while Statement 1 learning while Statement 2 learning Do While Statement 3 learning Do While Statement 4 learning Do While Statement 5 learning a For statement 0 learning for a For statements 2 learning for Statement 3 Learning SWITHCH Statement B

"Java Fundamentals" "Lesson Three" expressions, control structures