There is only one way to pass the parameters of a method in Java: value passing

1 //the parameter passing mechanism of the method (1) and the basic type of the formal parameter are passed. 2 classprimitivetransfertest3 {4      Public Static voidSwapintAintb)5     {6         //The following code implements a and B switching7         inttemp =A;8A =b;9b =temp;TenSystem.out.println (the value of a in the swap method is: "+a+", the value of B is: "+b); One     } A      Public Static voidMain (string[] args) -     { -         intA = 6; the         intB = 9; - Swap (A, b); -System.out.println ("After the swap is over, the value of variable A is:" +a+ ", and the value of variable B is:" +b); -     } + } -  +  A //the parameter passing mechanism of the method (2); The reference type does the pass of the formal parameter.  at classDatawrap - { -     intA; -     intb; - } - classreferencetransfertest in { -      Public Static voidswap (Datawrap DW) to     { +         //The following code implements the exchange of A and B.  -DW.A = dw.a^dw.b; thedw.b = dw.a^dw.b; *DW.A = dw.a^dw.b; $System.out.println (the value of a member variable in the Swap method is: "+dw.a+", the value of the B member variable is: "+dw.b);Panax NotoginsengSYSTEM.OUT.PRINTLN (DW);//[email protected] -         //DW = null;//This is to prove that if the application of this DW is directed to NULL, it will not affect the point of the DW in the main method.  the     } +      Public Static voidMain (string[] args) A     { theDatawrap DW =Newdatawrap (); +DW.A = 6; -DW.B = 9; $ swap (DW); $System.out.println ("After the swap is over, the value of the a member variable is:" +dw.a+ ", the value of the B member variable is:" +dw.b); -SYSTEM.OUT.PRINTLN (DW);//[email protected]//It is proved that the address (that is, the pointer) is actually the value (site) passed by the reference pass. -     } the}

As can be seen from the above two examples, there is only one form of parameter passing for a method in Java, that is, value passing.

There is only one way to pass the parameters of a method in Java: value passing