iwan tto do2 ddynamicarraylistexample :
[1][2][3]
[4][5][6]
[7][8][9]
与I used this code :
ArrayList group=new ArrayList (；
group.add (new ArrayList (1，2，3 )；
howshouldiinitializethisarraylist？
ifitisnotnecessaryfortheinnerliststobespecificallyarraylists，onewayofdoingsuchinitializationinjava7wouldbeasfolllows 3360
ArrayList group=new ArrayList (；
group.add (arrays.as list (1，2，3 )；
group.add (arrays.as list (4，5，6 )；
group.add (arrays.as list (7，8，9 )；
for (列表列表3360组) {
for(integerI:list ) {
}
}