el valor no se usa nunca, aunque se usa

Saif Ashraf:

Recibo un error en mi código que (la primera en el principal, si el principal y si otra cosa) valor de tn en el caso nunca se utiliza declaración, aunque el otro con valor asignado por encima de ella está bien, y otros valores son tn bien, y yo solía TN al final como en una TextView. por lo que la aplicación se salta y usa el siguiente valor tn ..

String Classification = null;
String tn = null;
if (pi<0){
    pi=0;
}
if (p200<=50){
    if (p4<50) {
        if (p200<5) {
            if (cu>4 && cc<=3 && cc>=1){
                Classification="GW";
                tn = "Well graded gravels, Gravel-Sand mixtures, little or no fines";
                //  ^^^ THIS ONE ^^^

            }
            else
                Classification="GP";
                tn = "Poorly graded gravels, Gravel-Sand mixtures, little or no fines";
        }
        if
        (p200>12){
            if ( (pi<y )|| pi<4){
                Classification="GM";
                tn ="Silty gravels, Poorly graded gravel-sand-silt mixtures";
            }
            if (pi>7 && pi>=y){
                Classification="GC";
                tn ="Clayey gravels, Poorly graded gravel-sand-clay mixtures";

            }
        }
        if (p200>=5 && p200<=12) {
            if (cu>4 && cc<=3 && cc>=1 && (pi<4 || pi<y )) {
                Classification = "GW-GM";
                tn="Well graded silty gravel";
            }
            else if (cu>4 && cc<=3 && cc>=1 && pi>7 &&pi>=y) {
                Classification = "GW-GC";
                tn="Well graded clayey gravel";
            }
            else if (pi<4 || pi<y){
                Classification = "GP-GM";
                tn="Poorly graded silty gravel";
            }
            else if (pi>7 && pi>=y){
                Classification = "GP-GC";
                tn="Poorly graded clayey gravel";
            }
        }
    }
    else if (p4>50){
        if (p200<5){
            if (cu>6 && cc>=1 && cc<=3){
                Classification="SW";
                tn="Well graded sands, gravelly sands, little or no fines";
                //^^^ AND THIS ONE ^^^
            }
            else
                Classification="SP";
                tn ="Poorly graded sands, gravelly sands, little or no fines";
        }
        else if (p200>5){
            if ((pi<y ) || pi<4){
                Classification="SM";
                tn="Silty sands, Poorly graded sand-silt mixtures";
            }
            else if (pi>7 && pi>y){
                Classification="SC";
                tn="Clayey Sands, Poorly graded sand-clay mixtures";
            }
        }
        if (p200>=5 && p200<=12) {
            if (cu>6 && cc<=3 && cc>=1 && (pi<4 || pi<y)) {
                Classification = "SW-SM";
            }
            else if (cu>6 && cc<=3 && cc>=1 && pi>=7) {
                Classification = "SW-SC";
            }
            else if (pi<4 ||pi<y ){
                Classification = "SP-SM";
            }
            else if (pi>7 && pi>y){
                Classification = "SP-SC";
            }
        }

    }

}
else if (p200>50){
    if (ll<50){
        if (pi>7  && pi>y){
            Classification="CL";
            tn ="Inorganic clays of low to medium plasticity, gravelly clays, sandy clays, silty clays, lean clays";
        }
        else if(pi<4){
            Classification="ML";
            tn="Inorganic silts and very fine sands, rock flour, silty or clayey fine sands with slight plasticity";
        }

    }
    else if (ll>50){
        if (pi>y){
            Classification="CH";
            tn="Inorganic clays of high plasticity, fat clays";
        }
        else if (pi<y) {
            Classification="MH";
            tn="Inorganic silts, micaceous or dictomaceous fine sandy or silty soils, elastic silts";
        }

    }
}
if (pi>=4 && pi<=7 && ll>16 &&ll<26 || (ll>26 && ll< 30 && pi>=y&& pi<=7)){
    Classification="CL-ML";
}
if (p4==0 && p200==0){
    Classification=" ";
    tn=" ";
}


if(p200>100 || p4>100 || pi>70) {
    if (p200 > 100)
        editText1.setError("out of range");
    if (p4 > 100)
        editText2.setError("out of range");
    if (pi >= 70)
        editText5.setError("out of range");
}
else {
        result.setText(String.valueOf(Classification));
        typicalname.setText(String.valueOf(tn));
}
Jens:

se olvida de {}arround sus bloques más, por lo que la segunda línea se ejecuta siempre y prevalece sobre el valor

if (cu>4 && cc<=3 && cc>=1){
   Classification="GW";
    tn = "Well graded gravels, Gravel-Sand mixtures, little or no fines";
    //  ^^^ THIS ONE ^^^

}
else {
   //^ is missing also on end of this block
    Classification="GP";
    tn = "Poorly graded gravels, Gravel-Sand mixtures, little or no fines";
}

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