publicclassTest{2.publicstaticStringoutput=””；3.4.publicstaticvoidfoo（inti）{5.try{6.if（i

1.publicclassTest{2.publicstaticStringoutput=””；3.4.publicstaticvoidfoo（inti）{5.try{6.if（i==1）{7.thrownewException（）；8.}9.output+=“1”；10.}11.catch（Exceptione）{12.output+=“2”；13.return；14.}15.finally{16.output+=“3”；17.}18.output+=“4”；19.}20.21.publicstaticvoidmain（Stringargs[]）{22.foo（0）；23.foo（1）；24.25.}26.}Whatisthevalueofthevariableoutputatline23？（）