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reapired the mistake ,which is the regular expression can inut a nill string

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evanljp 2018-05-11 12:08:48 +08:00
parent cf21279738
commit 63c24c4c7e
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notes/剑指 offer 题解.md
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@ -1017,6 +1017,7 @@ public boolean match(char[] str, char[] pattern) {
```java ```java
public boolean isNumeric(char[] str) { public boolean isNumeric(char[] str) {
if(str.length==0||str==null) return false;
return new String(str).matches("[+-]?\\d*(\\.\\d+)?([eE][+-]?\\d+)?"); return new String(str).matches("[+-]?\\d*(\\.\\d+)?([eE][+-]?\\d+)?");
} }
``` ```