java.io.InputStream的read()和read(byte[] b)和read(byte[] b, int off, int len)有什么不同解决方法_J2SE

java.io.InputStream的read()和read(byte[] b)和read(byte[] b, int off, int len)有什么不同
java.io.InputStream的read()和read(byte[] b)和read(byte[] b, int off, int len)有什么不同啊？什么时候用read()？什么时候用read(byte[] b)，什么时候用read(byte[] b, int off, int len)啊？

同问java.io.OutputStream的write(byte[] b)和write(byte[] b, int off, int len) 和te(int b)方法！

------解决方案--------------------
read()
Reads the next byte of data from the input stream.
int read(byte[] b)
Reads some number of bytes from the input stream and stores them into the buffer array b.
int read(byte[] b, int off, int len)
Reads up to len bytes of data from the input stream into an array of bytes.

------解决方案--------------------
lz去查API最清楚，同一个方法，参数不同，根据需要调用了。
------解决方案--------------------
源码

Java code

public int read(byte b[]) throws IOException {    return read(b, 0, b.length);    }
------解决方案--------------------
read()读取1个字节
read(byte[] b)将文本中的所有数据读取到b这个字节数组中
read(byte[] b, int off, int len)将文本中的所有数据读入到b字节数组的指定位置（这个貌似是这样
  的，没有去测试）

如楼上所说，这些都是可以在帮助文档里面查到的~
------解决方案--------------------
探讨

read() 
    Reads the next byte of data from the input stream. 
int read(byte[] b) 
    Reads some number of bytes from the input stream and stores them into the buffer array b. 
int read(byte[] ……

------解决方案--------------------
Java code//从源码可以看出来，他们本来就是同一个东西public int read(byte b[]) throws IOException {    return read(b, 0, b.length);}public int read(byte b[], int off, int len) throws IOException {    if (b == null) {        throw new NullPointerException();    } else if (off < 0 || len < 0 || len > b.length - off) {        throw new IndexOutOfBoundsException();    } else if (len == 0) {        return 0;    }    int c = read();    if (c == -1) {        return -1;    }    b[off] = (byte)c;    int i = 1;    try {        for (; i < len ; i++) {        c = read();        if (c == -1) {            break;        }        b[off + i] = (byte)c;        }    } catch (IOException ee) {    }    return i;}public abstract int read() throws IOException;
------解决方案--------------------
read()读取1个字节
read(byte[] b)将文本中的所有数据读取到b这个字节数组中
read(byte[] b, int off, int len)从流的第off个字节开始，读入长度为len的字节的数据



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http://www.mowker.com/view/
------解决方案--------------------
API的干活