Java--ByteArrayInputStream和ByteArrayOutStream

代码如下：

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;




public class ByteArrayDemo01 {
	public static void main(String args[]){
		String str="HELLOJAVA";
		ByteArrayInputStream bis=new ByteArrayInputStream(str.getBytes());
		ByteArrayOutputStream bos=new ByteArrayOutputStream();
		int temp=0;
		while((temp=bis.read())!=-1){
			char c=(char)temp;
			bos.write(Character.toLowerCase(c));
		}
		String newStr=bos.toString();
		try {
			bis.close();
			bos.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.print(newStr);
	}


}

运行如下：

hellojava