Windows set Environment Variables - Java path

Go to Eclipse menu:
Window -> Preferences -> Java -> Code Style -> Formatter
Press NEW profile or EDIT if have you some profile.
Setup your settings.
Save settings.

String s = "Some text for appending

";
 TextView   mTitle = (TextView) findViewById(R.id.title_text);
 mTitle.setText(R.string.app_name); // insert text from strings.xml
 mTitle.append(s); // append string like a variable value
 mTitle.append("My string will appended

"); // append string

You can insert this source code into onCreate in your activity file

For and continue statement in Java.

public class MainClass {
	public static void main(String[] arg) {
		String[] arrayOfString = { "Hello", "people", "hello", "world!" };

		for (int i = 0; i < arrayOfString.length; i++){
			if(arrayOfString[i].equals("hello"))
				continue; // skip to for
			System.out.println(arrayOfString[i]);
		}
	}
}
/*
Hello
people
world!
*/

Android development
Java float is 32 bit single precision type and used when fractional precision calculation is required.

Java float je 32 bitů veliké číslo sloužící především pro přesný výsledek za desetinnou tečkou například při dělení čísel. Pro větší přesnost použíijte 64 bitový typ Double.

		// declaration and assignment of value  type float
		float x = 18.41785f;
		//print formated  value
		System.out.printf("The value of x is %.3f%n", x); // 18.418
                
                // declaring more variables in single statement
                float f1 = 12.4F, f2 = 564.5F, f3 = 14.589F;

		// float range of value
		System.out.println(Float.MIN_VALUE); // 4E-45
		System.out.println(Float.MAX_VALUE); // 4028235E38

		// is NaN  Not-a-Number
		float f = (float) Math.sqrt(-15);
		boolean bNaN = Float.isNaN(f);
		System.out.print(bNaN); // true
		
                // check if a string is a valid number in Java example
                // convert string to float Java example
		String sF = "12.8";
		float fParse = Float.parseFloat(sF);

	       // convert strings to numbers
	      String sFl = "15.48";
	      float fFromString = (Float.valueOf(sFl)).floatValue();

// float to string in Java example code
Float fObj = new Float(68.5);
String str = fObj.toString();
// else 
Float fS = 11.6f;
String sFloat = fS.toString();

              // compare two float variables
	      Float fComp1 = 4.3f;
	      if(fComp1.equals(4.3f))
	  		System.out.print("true");

	    // compares the two specified float values in Java example
	    int i =	Float.compare(11.5f, 11.7f); // -1 first < second
	    // 0 first == second
	    // 1 first > second
	    System.out.print(i);

Admob testing on emulator issue.
Android Eclipse code warning:
setTesting(boolean) from the type AdRequest is deprecated
Solution:
adRequest.addTestDevice(AdRequest.TEST_EMULATOR);

AdView adView = new AdView(this, AdSize.BANNER, "a14d9..........");//MY_AD_UNIT_ID
AdRequest adRequest = new AdRequest();
		adRequest.setTesting(true); // deprecated

		adRequest.addTestDevice(AdRequest.TEST_EMULATOR); // OK
		adView.loadAd(adRequest);