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Recent work in both lattice and continuum QCD shows that the
gauge fieldcould be massive. We investigate the bound states of
two and three massivegluons with a Schroedinger equation. The
short distance potential isapproximated by one-gluon-exchange
while the long distance part arisesfrom a breakable string. We
find that the size of 0++ glueball is verysmall compared with
others. We also estimate the mass of 1-- glueballto be 3.2-3.4
GeV, which is very close to the mass of J/psi.
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