我的程序下面的行上出现编译时“无法访问的代码”错误：
System.out.println（“ i =” + i +“，j =” + j）;
public static void main(String[] args) {
int i = 0, j = 5;
tp: for (;;)
{
i++;
for (;;)
{
if (i > --j) {
break tp;
}
}
System.out.println("i =" + i + ", j = " + j);
}
}
请帮助我找到确切的原因。提前致谢。
让我们分析一下这段代码：
tp: for (;;) //<-- similar to while(true)
{
i++; //increases i by 1
for (;;) //<-- similar to while(true)
{
if (i > --j) { //decreases j and compares its value against i
break tp; //breaks tp, which means breaking the outer for loop
}
}
//while(true) above
//if break gets executed, it breaks this for loop
//so this line can never be executed
System.out.println("i =" + i + ", j = " + j);
}
最简单的解决方案：
移动System.out.println("i =" + i + ", j = " + j);到外for循环之外。
tp: for (;;)
{
i++;
for (;;)
{
if (i > --j) {
break tp;
}
}
}
System.out.println("i =" + i + ", j = " + j);
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