class Number{
int i;
}

public class Ex_03_Assignment{

public static void main(String[] args) {
Integer n1 = new Integer(48);
Integer n2 = new Integer(48);
//(1) false
System.out.println(n1 == n2);
//(2)true
System.out.println(n1.equals(n2));
//(3)false不明白什么意思....
Number n3 = new Number();
Number n4 = new Number();
n3.i = 30;
n4.i = 30;
System.out.println(n3.equals(n4));
}
}

怎么么有人解释第三个的错误原因啊,
Number n3 = new Number();
Number n4 = new Number();
n3.i = 30;
n4.i = 30;
System.out.println(n3.equals(n4));//(3)false不明白什么意思....
按照你们的理论,equals比较的是数值,n3和n4的数值都是30呀.....

刚才看了张孝祥的教程视频,正好有这个知识点,现在印象更加深刻了...
谢谢楼上的...