StringIndexOutOfBoundsException

<span style="font-family:Microsoft YaHei;font-size:14px;">public class StringIndexBoundsExceptionTest {

@Test
public void test(){
String str = "h";
String a = "wfe";
System.out.println(str.substring(1));//抛出异常StringIndexBoundsException
System.out.println(a.substring(1, 1));//正常显示
System.out.println(a.substring(1, 0));//抛出异常StringIndexBoundsException
}

}</span>