1000==1000？ 无花括号的for循环，*.05x3=？

  double num = 1.05;

        System.out.println(num * 3);//7.3500000000000005

        Integer a = 1000, b = 1000; 
        System.out.println(a == b);//false
        Integer c = 100, d = 100; 
        System.out.println(c == d);//true

<script type="text/javascript">
window.onload=function(){
fn1();
}
function fn1(age,hei) {
var age; 
alert(age); 
function age() { 
alert('hehe'); 
} 
}
</script>

//输出：

“function age() { 
alert('hehe'); 
}”

        int a = 2;
        double b = 2.22;
        a += b; //对的
        a = a + b;  //编译出错

for (int i = 0; i < 5; i++)
        Integer x = new Integer(i);//会编译出错，因为这句是声明语句，改为执行语句就可以了