StringTokenizer para validar clave en JAVA

[TolaWare]

Me gusto el porblema que planteaste y lo resolvi mas o menos

Cualquier duda, pregunte

Código:

public class test {
	public static void main(String [] args) {
		Clave key = new Clave("666","444","111");
		if(key.validarClave())
			System.out.println("Es correcto");
		else
			System.out.println("Es incorrecto");
	}
}

public class Clave {
	
	String subKey1;
	String subKey2;
	String subKey3;
	
	public Clave(String subClave1, String subClave2, String subClave3){
		subKey1 = subClave1;
		subKey2 = subClave2;
		subKey3 = subClave3;
	}
	
	public boolean validarClave(){
		if (validarSubStr1() && validarSubStr2() && validarSubStr3())
			return true;
		else
			return false;
	}
	
	private boolean validarSubStr1() {
		boolean ret = true;
		for (int i=0;i<subKey1.length();i++)
			if(Integer.parseInt(subKey1.substring(i,i+1))<=5)
				ret = false;
		if(subKey1.length()== 3 && ret)
			return true;
		else
			return false;
	}

	private boolean validarSubStr2() {
		boolean ret = true;
		for (int i=0;i<subKey2.length();i++)
			if(Integer.parseInt(subKey2.substring(i,i+1))>=5)
				ret = false;
		if(subKey2.length()== 3 && ret)
			return true;
		else
			return false;
	}

	private boolean validarSubStr3() {
		boolean ret = true;
		for(int i=0;i<subKey3.length()-1;i++)
			if(subKey3.toCharArray()[i]!=subKey3.toCharArray()[i+1])
				ret = false;
		if(subKey3.length()== 3 && ret)
			return true;
		else
			return false;
	}
	
}