goto statement in Java

Brand	Samsung
Model (codename)	Galaxy Mini (S5570)
Price (cena, včetně DPH)	3500 / 06.2012
Display size in Inch (v palcích)	3.14
Display-resolution	240x320
Dotek-typ	kapacitní
CPU typ	MSM7227
CPU MHz	600
CPU core
L2 cache	yes
RAM	256
ROM	512
GPU	Adreno 200
NenaMark2 Benchmark
GPU-GLBenchmark
Baterie mAh	1200
Foto MPx	3
Autofocus	no
Video	QVGA (320 x 240) při 15 frames/s
Official Android ICS	Android Froyo 2.2
CyanogenMod support	yes
Dotek-prstů-max	Dual-touch (two fingers)
Display-ppi	127
Display-retina	39%
Networks	GSM&EDGE (850 / 900 / 1.800 / 1.900 MHz) 3G (900 / 2.100 MHz)
Connectivity	Bluetooth V2.1 , USB V2.0 , USB mass storage , SyncML(DM) , WIFI , AGPS, 3.5 mm jack
Note

Samsung S5570 Galaxy Mini - image

Java Android functions and method examples of using.

.abs

.accept

.acquire

.add

.addAccountExplicitly

.addAction

.addAnimation

.addBitmap

.addCallback

.addCategory

.addCircle

.addDataScheme

.addEarcon

.addEmail

.addFirst

.addFlags

.addGesture

.addHeader

.addIntentOptions

.addName

.addOnGestureListener

.addPhone

.addPhotos

.addPreference

.addRule

.addShape

.addTab

.addTextChangedListener

.addURI

.addVertex

.addView

.adjustMetaAfterKeypress

.allocate

.allocateDirect

.alpha

.animate

.animateTransform

.answerCall

.append

.appendEncodedPath

.appendId

.appendWhere

.applyBatch

.arcTo

.argb

.arraycopy

.asFloatBuffer

.asIntBuffer

.asInterface

.asShortBuffer

.assignContactUri

.attachInterface

.attemptAuth

.authenticate

.available

.BackupAgent#onBackup

.BackupAgent#onRestore

.basicTypes

.beginAdding

.beginBatchEdit

.beginBroadcast

.beginDrawing

.blockingGetAuthToken

.blue

.build

.Builder

.buildUpon

.callActivityOnPause

.callActivityOnResume

.Callback#onKeyDown

.cancel

.cancelDiscovery

.charAt

.check

.checkArgument

.checkNotNull

.clear

.clearCheck

.clearHistory

.clearMetaKeyStates

.clearPhotos

.clearQueue

.clipPath

.clipRect

.close

.closing

.colorChanged

.commit

.commitText

.compare

.compareTo

.compile

.compress

.compressTexture

.computeBounds

.computePhysics

.concat

.connect

.ContactListAdapter

.contains

.copyPixelsFromBuffer

.copyStringToBuffer

.cos

.create

.createBitmap

.createBufferObjects

.createFromAsset

.createFromPdu

.createFromResource

.createFromStream

.createNewContact

.createRfcommSocketToServiceRecord

.createScaledBitmap

.Creator

.cubicTo

.currentAnimationTimeMillis

.currentTimeMillis

.dataChanged

.decodeByteArray

.decodeResource

.decodeStream

.delete

.deleteTitlePref

.dismiss

.dispatchDraw

.dispatchKeyEvent

.divideMessage

.doKeyDown

.doKeyUp

.doStart

.draw

.drawArc

.drawBitmap

.drawBitmapMesh

.drawCircle

.drawColor

.drawLine

.drawLines

.drawOval

.drawPaint

.drawPath

.drawPicture

.drawPoints

.drawPosText

.drawRect

.drawText

.drawTextOnPath

.drawVertices

.duration

.edit

.elapsedRealtime

.elementAt

.encode

.endAdding

.endAnimation

.endBatchEdit

.endCall

.endDrawing

.endRecording

.enforceInterface

.equals

.eraseColor

.execSQL

.execute

.exists

.extractAlpha

.fade

.fetchFriendStatuses

.fetchFriendUpdates

.filter

.findItem

.findNextFocus

.findPointerIndex

.findViewById

.finish

.finishBroadcast

.finishComposingText

.format

.forName

.from

.fromContext

.fromFile

.fromHtml

.fromInt

.fromString

.frustumM

.generate

.get

.getAbsolutePath

.getAction

.getActionMasked

.getActivity

.getActivityInfo

.getAdapter

.getArray

.getAttributeValue

.getBandLevelRange

.getBinder

.getBondedDevices

.getBoolean

.getBooleanExtra

.getBounds

.getBroadcast

.getBroadcastItem

.getBundle

.getBundleExtra

.getBytes

.getCameraInfo

.getCheckedRadioButtonId

.getChildCount

.getClassName

.getColor

.getColumnIndex

.getColumnIndexOrThrow

.getComponent

.getContent

.getContentDescription

.getContentResolver

.getContext

.getCount

.getCurrentItemIndex

.getCurrentModelView

.getCurrentPlayer

.getCurrentProjection

.getData

.getDataSize

.getDeadChar

.getDefault

.getDefaultAdapter

.getDefaultDisplay

.getDefaultSensor

.getDefaultSharedPreferences

.getDeviceConfigurationInfo

.getDimensionPixelOffset

.getDimensionPixelSize

.getDouble

.getDrawable

.getEmail

.getEntity

.getExternalMediaDir

.getExternalStoragePublicDirectory

.getExternalStorageState

.getExtras

.getFirstName

.getFirstVisiblePosition

.getFontMetrics

.getGesture

.getGestureEntries

.getHeight

.getHistoricalPressure

.getHistoricalTouchMajor

.getHistoricalX

.getHistoricalY

.getHistorySize

.getHolder

.getIBinder

.getIcon

.getIndexCount

.getInputStream

.getInstance

.getInstrumentation

.getInt

.getIntArray

.getInteger

.getIntExtra

.getIntrinsicHeight

.getIntrinsicWidth

.getItem

.getItemAtPosition

.getItemCount

.getJetPlayer

.getJSONArray

.getJSONObject

.getKey

.getKeyboard

.getLanguage

.getLastPathSegment

.getLayoutParams

.getLocationOnScreen

.getLong

.getLooper

.getMatrix

.getMaxCaptureRate

.getMeasuredHeight

.getMeasuredWidth

.getMenuInfo

.getMode

.getName

.getNumberOfBands

.getNumberOfCameras

.getNumStars

.getOnlyElement

.getOpacity

.getOriginatingAddress

.getOutputStream

.getPackageInfo

.getPackageManager

.getPackageName

.getPackedPositionChild

.getPackedPositionGroup

.getPackedPositionType

.getPadding

.getPaddingRight

.getPageContent

.getPaint

.getParameters

.getParams

.getParcelable

.getParcelableArrayExtra

.getParcelableExtra

.getParticleCount

.getPassword

.getPathSegments

.getPayload

.getPeerProfile

.getPid

.getPixels

.getPointerCount

.getPointerId

.getPosX

.getPosY

.getReadableDatabase

.getRecentTasks

.getRecords

.getRemoteDevice

.getResourceId

.getResources

.getRight

.getRingerMode

.getRootDirectory

.getSavedText

.getScaledHeight

.getScaledWidth

.getSelectedItemPosition

.getSelection

.getService

.getSharedPreferences

.getSize

.getSpinnerPosition

.getSpinnerSelection

.getStatusLine

.getStepSize

.getStore

.getStreamMaxVolume

.getStreamVolume

.getString

.getStringArray

.getStringArrayListExtra

.getStringExtra

.getStrokePaint

.getStrokeWidth

.getSurfaceFrame

.getSyncAdapterBinder

.getSystem

.getText

.getTextBounds

.getTextSize

.getTextWidths

.getThread

.getTnf

.getTransformation

.getType

.getUnicodeChar

.getUserId

.getValue

.getView

.getWidth

.getWord

.getWordMatches

.getWritableDatabase

.getX

.getXPrecision

.getY

.getYPrecision

.glActiveTexture

.glAlphaFunc

.glAlphaFuncx

.glAttachShader

.glBindBuffer

.glBindFramebufferOES

.glBindRenderbufferOES

.glBindTexture

.glBlendFunc

.glBufferData

.glCheckFramebufferStatusOES

.glClear

.glClearColor

.glClearColorx

.glClearDepthf

.glClearDepthx

.glClearStencil

.glClientActiveTexture

.glClipPlanef

.glClipPlanex

.glColor4f

.glColor4x

.glColorMask

.glColorPointer

.glCompileShader

.glCompressedTexImage2D

.glCompressedTexSubImage2D

.glCopyTexImage2D

.glCopyTexSubImage2D

.glCreateProgram

.glCreateShader

.glCullFace

.glCurrentPaletteMatrixOES

.glDeleteProgram

.glDeleteShader

.glDeleteTextures

.glDepthFunc

.glDepthMask

.glDepthRangef

.glDepthRangex

.glDisable

.glDisableClientState

.glDrawArrays

.glDrawElements

.glDrawTexfOES

.glDrawTexfvOES

.glDrawTexiOES

.glDrawTexivOES

.glDrawTexsOES

.glDrawTexsvOES

.glDrawTexxOES

.glDrawTexxvOES

.glEnable

.glEnableClientState

.glEnableVertexAttribArray

.glFinish

.glFlush

.glFogf

.glFogfv

.glFogx

.glFogxv

.glFramebufferRenderbufferOES

.glFramebufferTexture2DOES

.glFrontFace

.glFrustumf

.glFrustumx

.glGenBuffers

.glGenFramebuffersOES

.glGenRenderbuffersOES

.glGenTextures

.glGetAttribLocation

.glGetError

.glGetIntegerv

.glGetProgramiv

.glGetShaderiv

.glGetString

.glGetUniformLocation

.glHint

.glLightf

.glLightfv

.glLightModelf

.glLightModelfv

.glLightModelx

.glLightModelxv

.glLightx

.glLightxv

.glLineWidth

.glLineWidthx

.glLinkProgram

.glLoadIdentity

.glLoadMatrixf

.glLoadMatrixx

.glLoadPaletteFromModelViewMatrixOES

.glLogicOp

.glMaterialf

.glMaterialfv

.glMaterialx

.glMaterialxv

.glMatrixIndexPointerOES

.glMatrixMode

.glMultiTexCoord4f

.glMultiTexCoord4x

.glMultMatrixf

.glMultMatrixx

.glNormal3f

.glNormal3x

.glNormalPointer

.glOrthof

.glOrthox

.glPixelStorei

.glPointSize

.glPointSizex

.glPolygonOffset

.glPolygonOffsetx

.glPopMatrix

.glPushMatrix

.glQueryMatrixxOES

.glReadPixels

.glRenderbufferStorageOES

.glRotatef

.glRotatex

.glSampleCoverage

.glSampleCoveragex

.glScalef

.glScalex

.glScissor

.glShadeModel

.glShaderSource

.glStencilFunc

.glStencilMask

.glStencilOp

.glTexCoordPointer

.glTexEnvf

.glTexEnvfv

.glTexEnvx

.glTexEnvxv

.glTexGeni

.glTexImage2D

.glTexParameterf

.glTexParameteri

.glTexParameteriv

.glTexParameterx

.glTexSubImage2D

.glTranslatef

.glTranslatex

.gluLookAt

.glUniformMatrix4fv

.glUseProgram

.glVertexAttribPointer

.glVertexPointer

.glViewport

.glWeightPointerOES

.green

.group

.handleKeyDown

.handleKeyUp

.handleMessage

.has

.hasCategory

.hasEnded

.hashCode

.hasStarted

.height

.includeAllPackagesUnderHere

.incrementProgressBy

.incrementSecondaryProgressBy

.indexOf

.inflate

.init

.initialize

.insert

.insertStatuses

.interrupt

.invalidate

.invalidateAuthToken

.invert

.invoke

.isAdminActive

.isChecked

.isColumnCollapsed

.isColumnShrinkable

.isColumnStretchable

.isInProgress

.isInside

.iterator

.join

.kill

.killProcess

.lastIndexOf

.layout

.LayoutParams

.length

.lineTo

.ListAdapter#getCount

.ListAdapter#getItem

.ListAdapter#getItemId

.ListAdapter#getView

.Listener

.listenUsingRfcommWithServiceRecord

.load

.loadAllTitlePrefs

.loadAnimation

.loadData

.loadIcon

.loadJetFile

.loadLabel

.loadLayoutAnimation

.loadTexture

.loadTitlePref

.lockCanvas

.lockNow

.makeAudioCall

.makeMeasureSpec

.makeText

.mapPoints

.matcher

.max

.measure

.measureText

.min

.mkdirs

.MorseCodeConverterTest#testCharacterS

.moveTo

.moveToFirst

.multiply

.multiplyMM

.multiplyMV

.mutate

.myPid

.nanoTime

.newDelete

.newInsert

.newInstance

.newPullParser

.newUpdate

.newView

.newWakeLock

.next

.nextBoolean

.nextInt

.notify

.notifyDataSetChanged

.obtain

.obtainMessage

.obtainStyledAttributes

.offsetTo

.onActivityResult

.onAttachedToWindow

.onBackup

.onBindView

.onCellSelected

.OnCheckedChangeListener

.OnClickListener

.onContextItemSelected

.onCreate

.onCreateContextMenu

.onCreateDialog

.onCreateOptionsMenu

.OnDateSetListener

.onDestroy

.onDetachedFromWindow

.onDrag

.onDraw

.OnEditorActionListener

.onFinishInput

.onFocusChanged

.OnItemSelectedListener#onItemSelected

.onKeyDown

.onKeyUp

.onLongPress

.onMeasure

.OnMultiChoiceClickListener

.onNewIntent

.onOptionsItemSelected

.onPause

.onPostExecute

.onPreExecute

.onPrepareDialog

.onPrepareOptionsMenu

.onProgressUpdate

.onRestore

.onRestoreInstanceState

.onResume

.onSaveInstanceState

.onScale

.OnScanCompletedListener

.onSizeChanged

.onStart

.onStartInput

.onStartInputView

.onStop

.onSurfaceChanged

.onSurfaceCreated

.onSurfaceDestroyed

.OnTimeSetListener

.onTouchEvent

.onTransact

.onUpdateSelection

.onWindowFocusChanged

.open

.openRawResource

.Options

.order

.orthoM

.parse

.parseFloat

.parseInt

.parseLong

.pattern

.pause

.performClick

.performOnBackgroundThread

.pickSuggestionManually

.play

.playEarcon

.poll

.position

.post

.postConcat

.postDelayed

.postTranslate

.prepare

.prepareUserAgent

.preTranslate

.printStackTrace

.project

.Proxy

.put

.putBoolean

.putBundle

.putDouble

.putExtra

.putIndices

.putInt

.putIntArray

.putLong

.putParcelable

.putString

.putStringArrayList

.quadTo

.query

.queryIntentActivities

.queueJetSegment

.quit

.random

.read

.readBoolean

.readDouble

.readEntityData

.readException

.readFloat

.readInt

.readLong

.readString

.recycle

.red

.registerCallback

.registerListener

.registerOnSharedPreferenceChangeListener

.registerReceiver

.release

.remove

.removeActiveAdmin

.removeAllViews

.removeCallbacks

.removeElementAt

.removeGesture

.removeItem

.removeMessages

.removeView

.requery

.requestFocus

.reset

.resetPassword

.resolveActivity

.resolveCollisionWithBounds

.restore

.restoreState

.restoreToCount

.results

.rewind

.rotate

.rotateY

.round

.run

.runOnUiThread

.save

.saveLayer

.saveLayerAlpha

.saveRecentQuery

.saveState

.scale

.scaleM

.scanFile

.schedule

.send

.sendEmptyMessage

.sendEmptyMessageDelayed

.sendKeys

.sendMessage

.sendMessageDelayed

.sendTextMessage

.sendToTarget

.set

.setAction

.setActivity

.setActivityToSpoof

.setAdapter

.setAdjustViewBounds

.setAlpha

.setAlphabeticShortcut

.setAngle

.setAnimationListener

.setAntiAlias

.setARGB

.setAudioStreamType

.setBackgroundColor

.setBackgroundDrawable

.setBackgroundResource

.setBandLevel

.setBase

.setBitmap

.setBounds

.setButton

.SetButtonView

.setCamera

.setCancelable

.setCaptureSize

.setCell

.setCellListener

.setChecked

.setChoiceMode

.setClass

.setClassName

.setClickable

.setColor

.setColorFilter

.setColumnCollapsed

.setColumnShrinkable

.setColumnStretchable

.setComponent

.setComponentEnabledSetting

.setCompoundDrawables

.setCompoundDrawablesWithIntrinsicBounds

.setConnectionTimeout

.setContent

.setContentView

.setCornerRadii

.setCurrentHour

.setCurrentMinute

.setCurrentPlayer

.setCurrentView

.setData

.setDataCaptureListener

.setDataSource

.setDefaultValues

.setDialogTitle

.setDialogue

.setDifficulty

.setDisplay

.setDither

.setDrawFilter

.setDrawingCacheEnabled

.setDropDownViewResource

.setDuration

.setEGLConfigChooser

.setEGLContextClientVersion

.setEmpty

.setEnabled

.setEntity

.setEntries

.setEntryValues

.setError

.setEventListener

.setExpanded

.setFaceColor

.setFactory

.setFakeBoldText

.setFavorites

.setFillAfter

.setFillType

.setFilterBitmap

.setFinished

.setFixedSize

.setFlags

.setFocusable

.setFocusableInTouchMode

.setFormat

.setGameState

.setGesture

.setGLWrapper

.setGradientRadius

.setGradientType

.setGravity

.setGroupVisible

.setHeader

.setHeaderTitle

.setHeight

.setHorizontalGravity

.setIcon

.setId

.setIdentity

.setIdentityM

.setImageBitmap

.setImageDrawable

.setImageResource

.setImageViewResource

.setImeOptions

.setInAnimation

.setIndeterminate

.setIndicator

.setInput

.setIntent

.setInterpolator

.setIntrinsicHeight

.setIntrinsicWidth

.setItems

.setItemsCanFocus

.setKey

.setKeyboard

.setLang

.setLanguage

.setLatestEventInfo

.setLayoutAnimation

.setLayoutAnimationListener

.setLayoutParams

.setLayoutResource

.setLength

.setLocalMatrix

.setLookAtM

.setMargins

.setMaskFilter

.setMax

.setMaximumFailedPasswordsForWipe

.setMaximumTimeToLock

.setMediaController

.setMessage

.setMinimumWidth

.setMode

.setMovementMethod

.setMultiChoiceItems

.setMuteArray

.setMuteFlag

.setNegativeButton

.setNeutralButton

.setNotificationUri

.setNotifyOnChange

.setNumStars

.setOnBufferingUpdateListener

.setOnCancelListener

.setOnCheckedChangeListener

.setOnClickListener

.setOnClickPendingIntent

.setOnCompletionListener

.setOnEditorActionListener

.setOnItemClickListener

.setOnItemSelectedListener

.setOnKeyboardActionListener

.setOnKeyListener

.setOnPreparedListener

.setOnSeekBarChangeListener

.setOnTimeChangedListener

.setOnTouchListener

.setOnVideoSizeChangedListener

.setOrientation

.setOutAnimation

.setPadding

.setParameters

.setPassword

.setPasswordMinimumLength

.setPasswordQuality

.setPathEffect

.setPersistentDrawingCache

.setPixels

.setPolyToPoly

.setPositiveButton

.setPreviewDisplay

.setPreviewSize

.setProgress

.setProgressStyle

.setProjectionMap

.setPrompt

.setRating

.setRecents

.setRectToRect

.setRegistrationListener

.setRenderer

.setRepeatCount

.setRepeating

.setRepeatMode

.setRGB2YUV

.setRotate

.setRotateM

.setRunning

.setScale

.setScaleType

.setScreenHeight

.setScreenWidth

.setSelection

.setService

.setShader

.setShape

.setShifted

.setSingleChoiceItems

.setSingleLine

.setSoTimeout

.setSpan

.setSpeakerMode

.setSpinnerPosition

.setSpinnerSelection

.setStartOffset

.setState

.setStepSize

.setStrokeCap

.setStrokeJoin

.setStrokeWidth

.setStyle

.setSuggestions

.setSummary

.setSurfaceSize

.setSyncAutomatically

.setTables

.setTag

.setText

.setTextAlign

.setTextColor

.setTextKeepState

.setTextSize

.SetTextView

.setTextViewText

.setTime

.setTimeInMillis

.setTimeout

.setTimerView

.setTimeZone

.setTitle

.setTokenizer

.setToNow

.setTranslate

.setType

.setTypeface

.setUp

.setValue

.setVerticalGravity

.setVideoPath

.setVideoURI

.setView

.setVisibility

.setWinner

.setXfermode

.setYUV2RGB

.show

.shutdown

.SimpleOnScaleGestureListener

.sin

.size

.skipEntityData

.sleep

.sort

.speak

.split

.sqrt

.start

.startActivity

.startAnimation

.startAudio

.startDiscovery

.startFlipping

.startHierarchyTracing

.startLayoutAnimation

.startNow

.startPreview

.startService

.startSimulation

.startsWith

.Status

.Status>

.step

.stop

.stopBlink

.stopHierarchyTracing

.stopPreview

.stopSelf

.stopSimulation

.Stub

.subSequence

.substring

.switchCamera

.syncContacts

.synchronizedMap

.TabSpec#setContent

.TabSpec#setIndicator

.takeAudioCall

.tearDown

.texImage2D

.toBitmap

.toByteArray

.toggle

.toggleMute

.toHexString

.toLowerCase

.toString

.toUpperCase

.transact

.transformVertex

.translate

.translateM

.triggerClip

.unlockCanvasAndPost

.unpause

.unregisterCallback

.unregisterListener

.unregisterReceiver

.update

.updateAppWidget

.updateEmail

.updateExistingContact

.updateName

.updatePhone

.updateStatus

.updateVisualizer

.uptimeMillis

.valueChanged

.valueOf

.vibrate

.wait

.width

.wipeData

.withAppendedId

.withAppendedPath

.withValue

.withValueBackReference

.withValues

.write

.writeBoolean

.writeDouble

.writeEntityData

.writeEntityHeader

.writeFloat

.writeInt

.writeInterfaceToken

.writeLong

.writeNoException

.writeString

.writeStrongBinder

.writeTexture

.writeToParcel

.writeToStream

Update TextView by runnable. Handler, runnable, timer Android example.

public class TimerActivity extends Activity {
TextView hTextView;
Button hButton, hButtonStop;
private Handler mHandler = new Handler();
private int nCounter = 0;
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        hTextView = (TextView)findViewById(R.id.idTextView);
        hButton = (Button)findViewById(R.id.idButton);
        hButton.setOnClickListener(mButtonStartListener);
        hButtonStop = (Button)findViewById(R.id.idButtonStop);
        hButtonStop.setOnClickListener(mButtonStopListener);
    } // end onCreate

View.OnClickListener mButtonStartListener = new OnClickListener() {
	public void onClick(View v) {
		try {
			mHandler.removeCallbacks(hMyTimeTask);
         //        Parameters
         //        r  The Runnable that will be executed. 
         //        delayMillis  The delay (in milliseconds) until the Runnable will be executed. 
                       mHandler.postDelayed(hMyTimeTask, 1000); // delay 1 second
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
};


private Runnable hMyTimeTask = new Runnable() {
	   public void run() {
		   nCounter++;
	    	   hTextView.setText("Hallo from thread counter: " + nCounter);
	   }
	}; 
/**
 * 
 */
    View.OnClickListener mButtonStopListener = new OnClickListener() {
    	public void onClick(View v) {
    		 mHandler.removeCallbacks(hMyTimeTask);
    		
    	}
    };
}

main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
	android:id="@+id/idTextView"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<Button android:text="Button" 
android:id="@+id/idButton" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content"></Button>
 
 <Button android:layout_width="wrap_content" 
 android:layout_height="wrap_content" 
 android:id="@+id/idButtonStop" 
 android:text="Stop"></Button> 
    
    
</LinearLayout>

How set JAVA path to Environment Variables on Windows (7)
Select Start menu > Computer > System Properties > Advanced System Settings(properties).
Then open Advanced tab > Environment Variables and add a new system variable JAVA_HOME that points to your JDK folder, for example

 C:\Program Files\Java\jdk1.8.0_05

Toast in Android application is equivalent of Alert in JavaScript or MessageBox in WinApi.

// Toast android.widget.Toast.makeText(Context context, CharSequence text, int duration)
// public static Toast makeText (Context context, CharSequence text, int duration) 

Toast.makeText(getApplicationContext(), "Hello world!",
                  Toast.LENGTH_SHORT).show();