公共void testbytebuffer (()/hxdmg=bytebuffer.allocate ) 1024 ); hdmg=byte buffer.allocatedirect (1024; system.out.println (postition : ) buffer.position ); system.out.println(limit: ) buffer.limit ) ); system.out.println (capacity : ) buffer.capacity ) ); system.out.println(PSDXLC: ) buffer ); buffer.put('123'.getbytes ) ); system.out.print ln (-------- put 3360123 . ' ); system.out.println(PSDXLC: ) buffer ); buffer.flip (; //读写来自jw ddx.out.print ln (-------- flip……); system.out.println(PSDXLC: ) buffer ); buffer.get (; system.out.print ln (-------get…); system.out.println(PSDXLC: ) buffer ); buffer.compact (; system.out.print ln (-------compact……); system.out.println(PSDXLC: ) buffer ); buffer.clear (; system.out.print ln (-------- clear……); system.out.println(PSDXLC: ) buffer ); }