java代码---indexOf()方法

总结：indexOf(String str,int index)方法.从参数指定位置开始，如果index值超过了字符串长度，则返回-1

package com.a.b;
import java.io.*;
public class Chen {
	public static void main(String[] args) throws IOException {
		//线程。继承。抽象
		String test="After learning the material";
		String theStr="arn";
		int index=0,theCount=0;
		index=test.indexOf(theStr);
		while(index>=0){
			theCount=theCount+1;
		
			index=index+theStr.length();
			
			index=test.indexOf("arn",index);
			
			
		}
		System.out.println(index);
	//	System.out.println("the are "+theCount+" 'arn' in testStr.");
	}
}