我要评论java.lang.stringindexoutofboundsexception: string index out of range: -1
字符串截取下标越界
java.lang.stringindexoutofboundsexception: string index out of range: -1
at java.lang.string.substring(string.java:1967)
出错代码
result.put("value", valuebuilder.tostring().substring(0,valuebuilder.tostring().length()-1));修改后代码
if (stringutils.isnotblank(valuebuilder.tostring()) && valuebuilder.tostring().length() >0){
result.put("value", valuebuilder.tostring().substring(0,valuebuilder.tostring().length()-1));
}心得：
- stringindexoutofboundsexception 异常源码如下：
/**
* thrown by {@code string} methods to indicate that an index
* is either negative or greater than the size of the string. for
* some methods such as the charat method, this exception also is
* thrown when the index is equal to the size of the string.
*/
public
class stringindexoutofboundsexception extends indexoutofboundsexception {
private static final long serialversionuid = -6762910422159637258l;
/**
* constructs a {@code stringindexoutofboundsexception} with no
* detail message.
*
* @since jdk1.0.
*/
public stringindexoutofboundsexception() {
super();
}
/**
* constructs a {@code stringindexoutofboundsexception} with
* the specified detail message.
*
* @param s the detail message.
*/
public stringindexoutofboundsexception(string s) {
super(s);
}
/**
* constructs a new {@code stringindexoutofboundsexception}
* class with an argument indicating the illegal index.
*
* @param index the illegal index.
*/
public stringindexoutofboundsexception(int index) {
super("string index out of range: " + index);
}
}总共有以下几个方法会抛出该异常：
string.substring() string.charat() string.codepointat() string.codepointbefore() string.subsequence() string.getchars() string.getbytes()
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持代码网。
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