ackage com.project9;

public class Initail {

public static void main(String[] args) 

{

String str="学习 Java 编程";

System.out.println(str.length());

char c='J';

System.out.println(str.indexOf(c));

System.out.println(str.indexOf("Java"));

String[] name=str.split(" ");

System.out.print(Arrays.toString(name));//报错语句

System.out.println();

}

}