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3¡£Ê¹ÓÃSystem.arraycopy(s,start1,t,start2,length)·½·¨
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1.ÉÏÃæ·½·¨ÖÐarraycopyЧÂʽϸߡ£
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Object[][] aa;
Object[][] bb = aa.clone();
//or bb£½System.arraycopy(aa,0,bb, 0, bb.length);
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boolean b1 = ( aa[i] == bb[i] ); //true
boolean b2 = (aa[i][j] == bb[i][j]); //true, ¿É¼ûÊý×éÔªËØÖ»¸´ÖÆÁËÒýÓá£Ð¾ÉÊý×éÖ¸ÏòÏàͬµÄÄÚ´æµØÖ·¡££¨²»ÂÛ¶ÔÏóÊý×飬»¹ÊÇ»ù±¾ÀàÐÍÊý×飩
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public class Test {
    public static void main(String[] args) {
       
        /*
        * ¶ÔÏóµÄÒýÓô«µÝ
        */
//        A a = new A();
//        B b = new B(a);
//        System.out.println( a.getName() );
//        System.out.println( b.getA().getName() );
//        System.out.println( a==b.getA() );
//        a.setName("KE");
//        System.out.println( b.getA().getName() );


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public native String intern();
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