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Class.newInstance()
Constructor.newInstance()
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l             Class.newInstance() Ö»Äܹ»µ÷ÓÃÎ޲εĹ¹Ô캯Êý£¬¼´Ä¬ÈϵĹ¹Ô캯Êý£»¶øConstructor.newInstance() ¿ÉÒÔ¸ù¾Ý´«ÈëµÄ²ÎÊý£¬µ÷ÓÃÈÎÒâ¹¹Ôì¹¹Ô캯Êý¡£
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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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