JAVA | 47

输出

import java.io.OutputStream;import java.util.function.Consumer;public class Main {    public static void main(String[] args) throws Exception{        OutputStream outputStream = System.out;        String str = "java";        outputStream.write(str.getBytes());        Consumer <String> consumer = System.out::println;        consumer.accept("java");    }}

输入

import java.io.InputStream;public class Main {    public static void main(String[] args) throws Exception{        StringBuffer stringBuffer = new StringBuffer();        InputStream inputStream = System.in;        int temp = 0;        while ((temp = inputStream.read()) != -1){            if(temp == '\n'){                break;            }            stringBuffer.append((char)temp);        }        System.out.println(stringBuffer);    }}