char和int多种情况下的转换

package com.gxnu.bigdata.study.datastyle;

import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;

import org.junit.Test;

public class  {
	
	public void testArray() throws IOException{
		List<String> allLines = Files.readAllLines(Paths.get(
				"D:",
				"MyEclipse 2016",
				"Workspaces",
				"7-12",
				"src",
				"com",
				"maoge",
				"study",
				"io",
				"IoEx.java"),
				Charset.forName("UTF-8"));
		
		int[] arr = new int[65536];
		
		allLines.forEach((s)->{
			for(char ch:s.toCharArray()){
				
				//System.out.println(arr[ch-1]);
				//System.out.println(arr[ch-1]+1);
				//将某字符对应的数字减1作为该字符的角标，对该字符进行累计统计出现的次数。
				arr[ch-1] = arr[ch-1]+1;
				
			}
		});
		
		for(int i=0;i<arr.length;i++){
			char ch = (char)(i+1); //将数字还原成字符本身
			if(arr[i]>0){
				System.out.println(ch+"出现了"+arr[i]+"次");
			}
		}
		
		
	}
}