public class G3
{
/* public static void action(){
Test test = new Test();
test.deal();
} */
public static Class action(String str){
Class ass = null;
try
{
ass = Class.forName(str);
} catch (ClassNotFoundException e)
{
e.printStackTrace();
}//实例话一个类名为str的对象
return ass;
} static class Test
{
public void deal()
{
System.out.println("love");
}
}
public static void main(String[] args)
{
Class a = action("Test");
Test b = (Test)a;
}
}
请说明下理由,OK?
{
public void deal()
{
System.out.println("love");
}
}
public static void main(String[] args)
{
Class a = action("Test");
Test b = (Test)a; }
} 静态类不能被实例化
* 实例化内部类
*/
public class TestInnerClass { public static void main(String[] args) throws Exception {
Inner1 i1 = (Inner1) Class.forName("tests.TestInnerClass$Inner1").newInstance();
Inner2 i2 = (Inner2) Class.forName("tests.TestInnerClass$Inner2").newInstance();
Inner3 i3 = (Inner3) Class.forName("tests.TestInnerClass$Inner3").newInstance(); // error
}
public static class Inner1 { } static class Inner2 { } class Inner3 { }
}