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public class Test {
public static final short STATIC_C = 10;
public static void main(String[] args) {
//java整数常量默认为int类型
//1.直接把一个较小的整数(在byte以及short范围内),系统自动把整数常量当成byte或者short类型处理
byte a = 100;
byte aa = 105;
//自动类型转换
// char
// ↓↓↓
//byte ...
这是ChatClientSupport:
package org.apache.mina.example.chat.client;
import java.net.SocketAddress;
import javax.net.ssl.SSLContext;
import org.apache.mina.core.filterchain.IoFilter;
import org.apache.mina.core.future.ConnectFuture;
import org.apache.mina.core.service.IoHandler;
import org ...
这是chat服务器里面的main方法入口:
package org.apache.mina.example.chat;
import java.net.InetSocketAddress;
import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
import org.apache.mina.example.echoserver.ssl.BogusSslContextFactory;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
...
取数字n的符号,大于0返回1,小于0返回-1,等于0返回0
SQL> select sign( 100 ),sign(- 100 ),sign( 0 ) from dual;
SIGN(123 ) SIGN(- 100 ) SIGN( 0 )
--------- ---------- ---------
1 - 1 0