如何比较从StringTokenizer

Question

我想使用该程序来检查区域，但是我无法修复它。

ex：abc,def,ghi,jkl,mno

  

jkl = true;   abc = flase

public boolean isDistrict (String districtCheck){

    StringTokenizer st = new StringTokenizer(address,",");
    int tokenno = st.countTokens();

    for(int i=0;i<tokenno-2;i++)
        st.nextToken();

    String district  = st.nextToken();
    if(st.nextToken()==district);
        return true
        else
        return flase