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Class.newInstance()
Constructor.newInstance()
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l Class.newInstance() ÒªÇó±»µ÷ÓõĹ¹Ô캯ÊýÊǿɼûµÄ£¬Ò²¼´±ØÐëÊÇpublicÀàÐ͵Ä; Constructor.newInstance() ÔÚÌØ¶¨µÄÇé¿öÏ£¬¿ÉÒÔµ÷ÓÃ˽ÓеĹ¹Ô캯Êý¡£
Class A£¨±»µ÷ÓõÄʾÀý£©£º
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public class A {
private A(){
System.out.println("A's constructor is called.");
}
private A(int a,int b){
System.out.println("a:"+a+" b:"+b);
}
}
public class A {
private A(){
System.out.println("A's constructor is called.");
}
private A(int a,int b){
System.out.println("a:"+a+" b:"+b);
}
}
Class B£¨µ÷ÓÃÕߣ©£º
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import java.lang.reflect.Constructor;
import static java.lang.System.out;
public class B {
public static void main(String[] args) {
B b=new B();
out.println("ͨ¹ýClass.NewInstance()µ÷ÓÃ˽Óй¹Ô캯Êý:");
b.newInstanceByClassNewInstance();
out.println("ͨ¹ýConstructor.newInstance()µ÷ÓÃ˽Óй¹Ô캯Êý:");
b.newInstanceByConstructorNewInstance();
}
/*ͨ¹ýClass.NewInstance()´´½¨ÐµÄÀàʾÀý*/
private void newInstanceByClassNewInstance(){
try {
/*µ±Ç°°üÃûΪreflect£¬±ØÐëʹÓÃȫ·¾¶*/
A a=(A)Class.forName("reflect.A").newInstance();
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