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s1 = new String("abc");
s2 = new String("abc");
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s1==s2 ÊÇ false //Á½¸ö±äÁ¿µÄÄÚ´æµØÖ·²»Ò»Ñù£¬Ò²¾ÍÊÇ˵ËüÃÇÖ¸ÏòµÄ¶ÔÏó²» Ò»Ñù£¬
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s1.equals(s2) ÊÇ true //Á½¸ö±äÁ¿µÄËù°üº¬µÄÄÚÈÝÊÇabc£¬¹ÊÏàµÈ¡£
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Èç¹û£º StringBuffer s1 = new StringBuffer("a");
StringBuffer s2 = new StringBuffer("a");
½á¹û£º s1.equals(s2) //ÊÇfalse
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¶øObjectÀàÖеÄequals·½·¨ÊÇÓÃÀ´±È½Ï“µØÖ·”µÄ£¬ËùÒÔµÈÓÚfalse.
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class A
{
A obj1 = new A();
A obj2 = new A();
}
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obj1.equals(obj2)ÊÇfalse
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ÄÇô obj1==obj2 ÊÇtrue
obj1.equals(obj2) ÊÇtrue
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public class TestEquals {
public static void main(String[] args)
{
int a = 3;
int b = 4;
int c = 3;
System.out.println(a == b);//½á¹ûÊÇfalse
System.out.println(a == c);//½á¹ûÊÇtrue
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