Question

java for循环嵌套问题，为什么最后一个用于输出的for会报错

public class TestInteger {
public static void main(String[] args) {

Integer i = new Integer(23);
int res = i.intValue();
System.out.println("对象i对应的整数值"+res);
System.out.println(i.toString().length());
System.out.println(Integer.MAX_VALUE);
System.out.println(Integer.MIN_VALUE);

double r2 = Math.random();
System.out.println(r2);

Random rnd = new Random();
int r3 = rnd.nextInt(10);
System.out.println(r3);

char[] yanZhengMa = new char[4];
String result = "";
for(;;){
Random rnd2 = new Random();
int yzm = rnd2.nextInt(128);
if( yzm>=48&&yzm<=57||
yzm>=65&&yzm<=90||
yzm>=97&&yzm<=122)
for(int j =0;j<yanZhengMa.length;j++)
{

yanZhengMa[j] = (char)yzm;
}
else continue;
}

for(int j =0;j<yanZhengMa.length;j++)
{
result += yanZhengMa[j] ;
}

System.out.println("四位随机验证码"+result);

}

}

Answer 1

因为你的for (;;)是死循环，导致后面的代码无法运行，编译器会报错