Java入门16

d13
java.io.FileReader

• 1 核心类　sun.nio.cs.StreamDecoder
• 2 read() 读取一个字符串
• ３ read(char[ ]) 读取多个字符串

java.io.FileWriter

• 核心类　sun.nio.cs.StreamEncoder

缓冲区字符流

• １　BufferedReader
• 2 BufferedWriter
  

装饰模式

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设计思路
对原来方法进行一个包裹

public abstract class Writer implements Appendable, Closeable, Flushable {
    private char[] writeBuffer;
    private static final int WRITE_BUFFER_SIZE = 1024;
    protected Object lock;

    protected Writer() {
        this.lock = this;
    }

    protected Writer(Object var1) {
        if (var1 == null) {
            throw new NullPointerException();
        } else {
            this.lock = var1;
        }
    }

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BufferWriter