Two-part exchange code easy to understand Java parameter passing mechanism

One, Java is divided into two types of memory:

1, stack memory, used to store the basic types of variables and object reference variables;

2, heap memory, used to store the new keyword to create objects and arrays;

Two, Java method of parameter transfer mode only one-value transfer, that is, the actual parameters are copied into the method, the actual parameters themselves will not be any impact, reference to the C language function parameters passed, the form of participation in the actual parameters (at the time when the study is really good halo);

Third, the first paragraph of the Exchange code (basic type parameters)

public class Javatest {public
	static void (int a, int b)
	{
		//Exchange a,b value
		int temp = A;
		A = b;
		b = temp;
		System.out.println ("After swapping, the values of A and B in the swap method are:" + A + "  " + b);
	}
	public static void Main (string[] args)
	{
		int a = 3;
		int b = 9;
		Swap (A, b);
		System.out.println ("After the exchange is performed, the values of A and B in the main method are:" + A + "  " + b);
	}

Execution results:

Schematic diagram:

The second paragraph Exchange code (object is parameter)

Class Base
{public
	int A;
	public int b;
}

public class Javatest {
	the value of the A,b property in the public static void swap (base base) {
		//Exchange base Object
		int temp = BASE.A;
		Base.a = base.b;
		base.b = temp;
		System.out.println ("After the swap, the value of the A and B properties of the base object in the Swap method is" + Base.a + "" + base.b);
	}
	public static void Main (string[] args)
	{
		base base = new Base ();
		Base.a = 3;
		base.b = 9;
		Swap (base);
		System.out.println ("After the exchange is performed, the value of the A and B properties of the base object in the Main method are:" + Base.a + "" + base.b);
	}

Execution results:

Schematic diagram:

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