编译错误:找不到符号
当代码到达递归调用增量时,我收到错误找不到符号,我不知道为什么?这是增量代码。任何帮助将不胜感激。
public void increment() { Integer first = 0;
Character ch = num.charAt(num.length()-1);
Integer last = Character.digit(ch, 10);
if (num.length() > 1)
{
if (last == 9) {
last = 0;
if (num.length() >= 2)
{
String temp = new String(num.substring(0, num.length()-2));
temp.increment();
}
else
{
last++;
}
}
}
else
{
if (last == 9)
{
last = 0;
first = 1;
}
else
{
last++;
}
}
String t = new String();
String x = new String();
t = last.toString();
x = first.toString();
if (first > 0)
{
num.concat(x);
}
num.concat(t);
}
编辑:我真的是Java的新手,所以可以做的答案越基本越好。好的,所以我收到的错误是:BigNatural.java.35:找不到符号符号方法增量()位置:类java.lang.String
temp.increment()
并在此处清除所有其他问题,是整个代码。
public class BigNatural {private String num;
public BigNatural(String input) {
num = input;
}
public BigNatural(BigNatural input) {
num = input.toString();
}
public BigNatural(Integer input) {
num = input.toString();
}
public BigNatural() {
Integer i = 0;
num = i.toString();
}
public void increment() {
Integer first = 0;
Character ch = num.charAt(num.length()-1);
Integer last = Character.digit(ch, 10);
if (num.length() > 1)
{
if (last == 9) {
last = 0;
if (num.length() >= 2)
{
String temp = new String(num.substring(0, num.length()-2));
temp.increment();
}
else
{
last++;
}
}
}
else
{
if (last == 9)
{
last = 0;
first = 1;
}
else
{
last++;
}
}
String t = new String();
String x = new String();
t = last.toString();
x = first.toString();
if (first > 0)
{
num.concat(x);
}
num.concat(t);
}
public void decrement() {
Character ch = num.charAt(num.length()-1);
Integer last = Character.digit(ch, 10);
if(num.length() > 1)
{
if(last == 0)
{
String temp = new String(num.substring(0, num.length()-2));
temp.decrement();
}
else
{
last--;
}
}
else
{
if(last > 0)
{
last--;
}
else
{
last = 0;
}
}
String t = new String();
t = last.toString();
num.concat(t);
}
public String toString() {
return num;
}
}公共类BigNatural {
private String num;public BigNatural(String input) {
num = input;
}
public BigNatural(BigNatural input) {
num = input.toString();
}
public BigNatural(Integer input) {
num = input.toString();
}
public BigNatural() {
Integer i = 0;
num = i.toString();
}
public void increment() {
Integer first = 0;
Character ch = num.charAt(num.length()-1);
Integer last = Character.digit(ch, 10);
if (num.length() > 1)
{
if (last < 9) {
last++
}
else
{
last = 0;
if (num.length() >= 2)
{
String temp = new String(num.substring(0, num.length()-2));
temp.increment();
}
}
else {
last++;
}
}
else
{
if (last == 9)
{
last = 0;
first = 1;
}
else
{
last++;
}
}
String t = new String();
String x = new String();
t = last.toString();
x = first.toString();
if (first > 0)
{
num.concat(x);
}
num.concat(t);
}
public void decrement() {
Character ch = num.charAt(num.length()-1);
Integer last = Character.digit(ch, 10);
if(num.length() > 1)
{
if(last == 0)
{
String temp = new String(num.substring(0, num.length()-2));
temp.decrement();
}
else
{
last--;
}
}
else
{
if(last > 0)
{
last--;
}
else
{
last = 0;
}
}
String t = new String();
t = last.toString();
num.concat(t);
}
public String toString() {
return num;
}
}
回答:
字符串没有称为增量的方法。当然,这不是递归调用,因为您位于一个对象内(哪个对象?在您的代码中没有类定义),同时您在对String对象进行增量调用。
另外,永远不会使用您的临时字段。如果要在方法调用之间共享它,可以尝试如下操作:
public void increment (String temp){}
然后在调用它时传递它:
String temp = new String(num.substring(0, num.length()-2));increment(temp);
当然,您的功能不能那样工作。temp参数应在您的递增方法内进行管理。查看您的逻辑。这不再是语法问题。如果您无法更改方法签名,则将temp声明为BigNatural类的字段:
public class BigNatural {private String num;
private String temp
......
和内部增量方法只是做:
temp = new String(num.substring(0, num.length()-2));
以上是 编译错误:找不到符号 的全部内容, 来源链接: utcz.com/qa/402238.html