packagecom.hand.kinggrid;publicclassStrKit{publicstaticbooleannotBlank(Stringstr){return!isBlank(str);}publicstaticbooleanisBlank(Stringstr){if(str==null){returntrue;}intlen=str.length();if(len==0){returntrue;}for(inti=0;i<len;i++){switch(str.charAt(i)){case' ':case'\t':case'\n':case'\r':// case '\b':// case '\f':break;default:returnfalse;}}returntrue;}}