?? classtest.java
字號:
//演示Class類的用法
class ClassTest
{
public static void main(String[] args)
{
/*
//演示Class實例的獲取
Point pt = new Point();
Class c1 = pt.getClass();
System.out.println(c1.getName());
try
{
Class c2 = Class.forName("Point");
System.out.println(c2.getName());
}
catch(ClassNotFoundException ex)
{
ex.printStackTrace();
}
Class c3 = Point.class;
System.out.println(c3.getName());
int i = 3;
Class c4 = int.class;
System.out.println(c4.getName());
Class c5 = Integer.TYPE;
System.out.println(c5.getName());
Class c6 = Integer.class;
System.out.println(c6.getName());
//演示.class文件的加載
System.out.println("Before new Point");
new Point();
System.out.println("After new Point");
try
{
Class.forName("Line");
}
catch(ClassNotFoundException ex)
{
ex.printStackTrace();
}
*/
try
{
Class c = Class.forName(args[0]);
Point p = (Point)c.newInstance();
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
}
class Point
{
int x, y;
void output()
{
System.out.println("output Point");
}
}
class Line
{
static
{
System.out.println("Loading Line");
}
}
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