Question

出现java.lang.StringIndexOutOfBoundsException: String index out of range: 23的错误是怎么回事...

at java.lang.String.charAt(Unknown Source)
at A1Program.removeKeyword(A1Program.java:102)
at A1Program.createCipher(A1Program.java:36)
at A1Program.start(A1Program.java:18)
at A1.main(A1.java:12)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:272)

Answer 1

亲，是你在使用String.charAt(int i)；的时候。i大于String的长度了。好好检查一下

Answer 2

你调用的charAt()方法越界了，也就是你的参数<0或者是>=String.length()了

Answer 3

溢出；超过String的长度了

Answer 4

想取第23个元素时，超出下标的范围了