①真实性 ②多样性 ③巨量性 ④迅变性
{
publics tatic void main(String args[])
Int a[]={1,2,3}, b[];
Int c=5, d;
b=a
d=c
System.out.printIn (a[0]+""+a[1]+""+a[2]"");
System.out.printIn (b[0]+""+b[1]+""+b[2]"");
System.out.printIn("c= " +c+"d="+d);
}
<html>
<head>
<title>仰望星空</title>
</head>
<div id="topd">天文世界
</div>
<body>
</html>
public class Exdo
public static void main(String args[])
int i=1, sum=0;
do
If((%3)==0); sum +=i;
i++;
while(i<10);
System.out printna(* sum="+sum)"
Public class Ex2_4_2
Public static void main(String args[])
For (int i=1; i<=5; i++) //声明并初始化循环变量i,设置循环终值i<=5
{ System. out:tpt(+");
//执行循环体,输出i的值
System.out. printIn();
转换成while循环程序