Shock breakout is the brightest radiative phenomenon in a Type II
supernova (SN) which releases a stored thermal energy when a shock
emerges from the stellar surface. Although it was predicted to be very
bright, it is difficult to observe the shock breakout due to the short
duration and X-ray/ultravoilet-peaked spectra. First entire observations
of the shock breakouts of Type II SNe were reported in 2008 by ultra-violet
and optical observations by the GALEX satellite and supernova legacy
survey (SNLS), named SNLS-04D2dc and SNLS-06D1jd. We present multicolor
light curves of the Type II SN shock breakouts with radiation hydrodynamical
codes, STELLA, compare them with the observations, and derive the SN
properties.