Need Assistance in coding error in java program running on Android

Denpeter0229

I'm having issues in creating a program using Android Studio.I'm trying to create a program that calculate CGPA and GPA ,tut i get a little coding errors. Any assistance would be appreciated.

    public void getEditTextGPA() {
    String str = ((EditText) findViewById(R.id.GPAEditText)).getText().toString();
      if (str.trim().equalsIgnoreCase(".")) {
      showAlertMessage("Error", ". is not a valid number");
      this.errorMessageDisplayed = true;
      }
      while (true) {
      if (this.userInputGPA > 4.00D) {
      showAlertMessage("ERROR: CGPA Input", "You cannot have CGPA of over   4.00.");
      this.errorMessageDisplayed = true;
      }
      return;
      if (str.trim().matches("")) {
      this.userInputGPA = -1.0F;
      continue;
      }
      this.userInputGPA = Float.parseFloat(str);
      }

Error at this.userInputGPA=-1.0F; as unreachable statement

public void getGPAValueForGrade(String paramString, int paramInt) {
      String[] arrayOfString = {"A", "A-", "B+", "B", "B-", "C+", "C", "C-",   "D+", "D", "E", "Grade"};
      int i = 0;
      if (i >= 12)
      return;
      String str = arrayOfString[i];
      if (paramString.trim().equalsIgnoreCase(str))
      switch (i) {
        default:
        case 0:
        case 1:
        case 2:
        case 3:
        case 4:
        case 5:
        case 6:
        case 7:
        case 8:
        case 9:
        case 10:
        case 11:
      }
      while (true) {
      i++;
      break;
      this.GPAValueArray[paramInt] = 4.0F;
      continue;
      this.GPAValueArray[paramInt] = 3.67F;
      continue;
      this.GPAValueArray[paramInt] = 3.33F;
      continue;
      this.GPAValueArray[paramInt] = 3.0F;
      continue;
      this.GPAValueArray[paramInt] = 2.67F;
      continue;
      this.GPAValueArray[paramInt] = 2.33F;
      continue;
      this.GPAValueArray[paramInt] = 2.0F;
      continue;
      this.GPAValueArray[paramInt] = 1.67F;
      continue;
      this.GPAValueArray[paramInt] = 1.33F;
      continue;
      this.GPAValueArray[paramInt] = 1.0F;
      continue;
      this.GPAValueArray[paramInt] = 0.0F;
      continue;
      }
      }

Error at the 1st continue; as unreachable statement

 public void getTotalGPAValueFromSpinnerFloat() {
      getGPAValueForGrade(this.gpaSpinnerOne.getSelectedItem().toString(), 0);
      int i = 0 + 1;
      getGPAValueForGrade(this.gpaSpinnerTwo.getSelectedItem().toString(), i);
      int j = i + 1;
      getGPAValueForGrade(this.gpaSpinnerThree.getSelectedItem().toString(), j);
      int k = j + 1;
      getGPAValueForGrade(this.gpaSpinnerFour.getSelectedItem().toString(), k);
      int m = k + 1;
      getGPAValueForGrade(this.gpaSpinnerFive.getSelectedItem().toString(), m);
      int n = m + 1;
      getGPAValueForGrade(this.gpaSpinnerSix.getSelectedItem().toString(), n);
      int i1 = n + 1;
      getGPAValueForGrade(this.gpaSpinnerSeven.getSelectedItem().toString(),i1);
      int i2 = i1 + 1;
      getGPAValueForGrade(this.gpaSpinnerEight.getSelectedItem().toString(), i2);
      (i2 + 1);
      }

Error at the last part (i2 + 1); as not a statement

public void setTextResults() {
    TextView localTextView1 = (TextView) findViewById(R.id.GPATextView);
    TextView localTextView2 = (TextView) findViewById(R.id.CGPATextView);
    float f1 = 0.0F;
    float f2 = 0.0F;
    int i = 0;
    float f3;
    if (i >= 8) {
    f3 = f1 / f2;
    if (f2 != 0.0F)
    break label153;
    localTextView1.setText("GPA: 0.0");
    }
    float f4;
    float f5;
    while (true) {
    if (this.userInputGPA == -1.0F)
    break label258;
    f4 = f1 + this.userInputGPA * this.userInputUnits;
    f5 = f2 + this.userInputUnits;
    if (f5 != 0.0F)
    break label203;
    localTextView2.setText("CGPA: 0.0");
    return;
    if (this.GPAValueArray[i] != -1.0F) {
    f1 += this.GPAValueArray[i] * this.UnitValueArray[i];
    f2 += this.UnitValueArray[i];
    }

Errors at break label153,break label258 & break label203 as undefinable label

i++;
  break;
  label153:
  StringBuilder localStringBuilder1 = new StringBuilder("GPA: ");
  Object[] arrayOfObject1 = new Object[1];
  arrayOfObject1[0] = Float.valueOf(f3);
  localTextView1.setText(String.format("%.2f", arrayOfObject1));

Error in StringBuilder localStringBuilder1 = new StringBuilder("GPA: ") as not a statement

 label203:
Float f6 = f4 / f5;
StringBuilder localStringBuilder3 = new StringBuilder("CGPA: ");
Object[] arrayOfObject3 = new Object[1];
arrayOfObject3[0] = Float.valueOf(f6);
localTextView2.setText(String.format("%.2f", arrayOfObject3));
return;

Error in Float f6 = f4 / f5 as not a statement