多次调用方法时的奇怪结果

Answer 1

您的substr()功能出了问题。添加了一些调试变量，并使用2个不同的字符串运行。这是每个的第一次迭代：

    while(result.length() < Width)
    {
            i = result.nextBlank(i);
            String temp1 = result.substr(0,i);
            String temp2 = " ";
            String temp3 = result.substr(i + 1, result.length());
            int tmpint = result.length();

            result = result.substr(0,i) + " " +result.substr(i + 1, result.length());
            i = result.nextNonBlank(i);
    }

i: 1
tmpint: 34
result: 0x603450 "A string without a beginning space"
tmp1: 0x6038b0 "    with beginning space\021\001A "
tmp2: 0x603670 " "
tmp3: 0x603ad0 "x¦[÷ÿ\177string without a beginning space"

i: 0
tmpint: 24
result: 0x603450 "    with beginning space"
tmp1: 0x6038b0 "x¦[÷ÿ\177x¦[÷ÿ\177x¦[÷ÿ\177x¦[÷ÿ\177\021\001 "
tmp2: 0x603690 " "
tmp3: 0x603ad0 "   with beginning space"