遍历字符串替换实例

package aaa;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.zip.InflaterInputStream;

public class tihuan {

	public static void main(String[] args) throws IOException {
		BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));
//		List<String> list=new ArrayList<String>();
//		list.add(bf.readLine());
		String str=bf.readLine();
		char[] arr=str.toCharArray();
		StringBuffer b=new StringBuffer();
		System.out.println(Arrays.toString(arr));
		for(int i=0;i<arr.length;i++) {
			if(arr[i]=='o') {
				arr[i]='k';	
			}
			
		b.append(arr[i]);
		}
		System.out.println(b);
	
	}

}