Help with a basic game (tetris)

[adri_360]

Good nights, I post the code I'm developing for a tetris-based characters.
The problem I have is that I can't print the piece within the board. Could you help solve it?
I haven't any error.

P.D: Sorry for my bad english.

Thanks

Class Piezas

public class Piezas {
	
public Piezas() {}
//atributos
private int i;
private int j;
private char m[][];
private int formaPieza;

//Piece1
public void pieza1(){
	this.i=0;
	this.j=0;
	this.m = new char [3][3];
	
	for(i=0;i<m.length;i++){
		for(j=0;j<m.length;j++){
			if(i<3 && j==0){
				m[i][j]='*';
			}
			else{
				m[i][j]=' ';
			}
			System.out.print(m[i][j]+" ");
		}
		System.out.println();
	}
}
//Piece2
public void pieza2(){
	this.i=0;
	this.j=0;
	this.m = new char [3][3];
	
	for(i=0;i<m.length;i++){
		for(j=0;j<m.length;j++){
			if((i==1 && j==0)||(i==2 && j<3)){
				m[i][j]='*';
			}
			else{
				m[i][j]=' ';
			}
			System.out.print(m[i][j]+" ");
		}
		System.out.println();
	}
}
//Piece3
public void pieza3(){
	this.i=0;
	this.j=0;
	this.m = new char [3][3];
	
	for(i=0;i<m.length;i++){
		for(j=0;j<m.length;j++){
					if((i==1 && j==2)||(i==2 && j<3)){
						m[i][j]='*';
					}
					else{
						m[i][j]=' ';
					}
					System.out.print(m[i][j]+" ");
				}
				System.out.println();
	}
}
//Piece4
public void pieza4(){
	this.i=0;
	this.j=0;
	this.m = new char [3][3];
	
	for(i=0;i<m.length;i++){
		for(j=0;j<m.length;j++){
			if((i==1 && j==1)||(i==2 && j<3)){
				m[i][j]='*';
			}
			else{
				m[i][j]=' ';
			}
			System.out.print(m[i][j]+" ");
		}
		System.out.println();
	}
}
//Piece5
public void pieza5(){
	this.i=0;
	this.j=0;
	this.m = new char [3][3];
	
	for(i=0;i<m.length;i++){
		for(j=0;j<m.length;j++){
			if((i==1 && j>0)||(i==2 && j<2)){
				m[i][j]='*';
			}
			else{
				m[i][j]=' ';
			}
			System.out.print(m[i][j]+" ");
		}
		System.out.println();
	}

}
//Piece6
public void pieza6(){
	this.i=0;
	this.j=0;
	this.m = new char [3][3];
	
	for(i=0;i<m.length;i++){
		for(j=0;j<m.length;j++){
			if((i==1 && j<2)||(i==2 && j>0)){
				m[i][j]='*';
			}
			else{
				m[i][j]=' ';
			}
			System.out.print(m[i][j]+" ");
		}
		System.out.println();
	}
}
//The piece is randomly chosen
public void asignarPiezas() {
	int n = 0;
	n = (int) Math.floor(Math.random()*6+1);
	
	//System.out.println(n);
	
	switch(n){
	case 1:
		Piezas p1 = new Piezas();
		p1.pieza1();
		formaPieza=1;
		break;
	case 2: 
		Piezas p2 = new Piezas();
		p2.pieza2();
		 formaPieza=2;
		break;
	case 3:
		Piezas p3 = new Piezas();
		p3.pieza3();
		 formaPieza=3;
		break;
	case 4: 
		Piezas p4 = new Piezas();
		p4.pieza4();
		 formaPieza=4;
		break;
	case 5: 
		Piezas p5 = new Piezas();
		p5.pieza5();
		 formaPieza=5;
		break;
	case 6: 
		Piezas p6 = new Piezas();
		p6.pieza6();
		 formaPieza=6;
		break;
	}
	
}
//index for each piece so that then the board behaves in a way or another to place

public int getformaPieza(){
	return formaPieza;
}
}

Class Tablero

import java.util.Scanner;

public class Tablero extends Casillas{
	Tablero() {}
	private int i;
	private int j;
	private char matrizTablero [][];
	private boolean comprobacion;
	private boolean meter;

//method that prints the empty board
public void creacionTablero(){
	this.matrizTablero= new char[8][8];
	this.i=0;
	this.j=0;
	//Casillas obj_casilla = new Casillas();
	//obj_casilla.setCasilla('_');
	
	for(i=0;i<8;i++){
	for(j=0;j<8;j++){
			matrizTablero[i][j]='_';//obj_casilla.getCasilla();
			System.out.print(matrizTablero[i][j]+" ");
		}
		System.out.println();
	}
		
	}
//Prints piece placed on the board

public void imprimirPieza(Piezas p){
	this.meter=false;
	this.i=0;
	this.j=0;
	
	for(j=0;j<8;j++){
		for(i=7;i<=0;i--){
			meter = comprobarPieza(i, j, p);
		}
		if(comprobacion == true){
			colocarPieza(i, j, p);
		}
		}
	
}

//according to the piece that is (by number) checks of different article so the free holes on the board

public boolean comprobarPieza(int i, int j, Piezas p){
	int numeroPieza = p.getformaPieza();
	this.comprobacion=true;
	
	switch(numeroPieza)
	{
	case 1:
		for(i=7;i>=2;i--){
			for(j=0;j<8;j++){
		if((matrizTablero[i][j]=='_') && (matrizTablero[i-1][j]=='_') && (matrizTablero[i-2][j]=='_')){
				comprobacion=true;
			}
			else{
				comprobacion=false;
			}
		}
	}

		break;
	case 2:
		for(i=7;i>=0;i--){
			for(j=0;j<8;j++){
		if((matrizTablero[i][j]=='_') && (matrizTablero[i-1][j]=='_') && (matrizTablero[i][j-1]=='_') && (matrizTablero[i][j-2]=='_')){
			comprobacion=true;
			
		}else{
			comprobacion=false;
		}
			}
		}

		break;
	case 3:
		for(i=7;i>=0;i--){	
		for(j=0;j<8;j++){
				if((matrizTablero[i][j]=='_') && (matrizTablero[i][j-1]=='_') && (matrizTablero[i][j-2]=='_') && (matrizTablero[i-1][j-2]=='_')){
					comprobacion=true;
			}
			else{
				comprobacion=false;
			}
			}
		}

		break;
	case 4:
		for(i=7;i>=0;i--){	
		for(j=0;j<8;j++){
				if((matrizTablero[i][j]=='_') && (matrizTablero[i][j-1]=='_') && (matrizTablero[i][j-2]=='_') && (matrizTablero[i-1][j-1]=='_')){
					comprobacion=true;
				}
				else{
					comprobacion=false;
				}
			}
		}

		break;
	case 5:
		for(i=7;i>=0;i--){
		for(j=0;j<8;j++){
				if((matrizTablero[i][j]=='_') && (matrizTablero[i][j-1]=='_') && (matrizTablero[i-1][j-2]=='_') && (matrizTablero[i-1][j-1]=='_')){
					comprobacion=true;
				}
				else{
					comprobacion=false;
				}
			}
				
		}
		break;
	case 6:
		for(i=7;i>=0;i--){
		for(j=0;j<8;j++){
				if((matrizTablero[i-1][j]=='_') && (matrizTablero[i-1][j-1]=='_') && (matrizTablero[i][j-2]=='_') && (matrizTablero[i][j-1]=='_')){
					comprobacion=true;
				}
				else{
					comprobacion=false;
				}
			}
		}
		break;

	}
	return comprobacion;
}

//form of randomly generated piece to place on the board
public void colocarPieza( int i ,int j,  Piezas p){
	int numeroPieza = p.getformaPieza();
	
	switch(numeroPieza)
	{
		case 1 :
			matrizTablero [i][j]='*';
			matrizTablero [i-1][j]='*';
			matrizTablero [i-2][j]='*';
			break;
		case 2 :
			matrizTablero [i][j]='*';
			matrizTablero [i-1][j]='*';
			matrizTablero[i][j-1]='*';
			matrizTablero[i][j-2]='*';
			break;
		case 3 :
			matrizTablero [i][j]='*';
			matrizTablero[i][j-1]='*';
			matrizTablero[i][j-2]='*';
			matrizTablero[i-1][j-1]='*';
			break;
		case 4	:
			matrizTablero[i][j]='*';
			matrizTablero[i][j-1]='*';
			matrizTablero[i][j-2]='*';
			matrizTablero[i-1][j-1]='*';
			break;
		case 5 :
			matrizTablero[i][j]='*';
			matrizTablero[i][j-1]='*';
			matrizTablero[i][j-2]='*';
			matrizTablero[i-1][j-1]='*';
			break;
		case 6:
			matrizTablero[i-1][j]='*';
			matrizTablero[i-1][j-1]='*';
			matrizTablero[i][j-2]='*';
			matrizTablero[i][j-1]='*';
			break;		
}
	
		
}
}

Class Partida

import java.util.Scanner;

public class Partida extends Tablero{

//Método para introducir "enter"	
public String funcionEnter(){
	String enter = "";
	Scanner leeCadena = new Scanner (System.in);
	String tecla = "";
	System.out.println("<Pulse enter>");
	enter = leeCadena.nextLine();
	return enter;
}

public static void main(String[] args) {
		int c=0;
		String tecla="";
		
		
		do{
		//Pieza elegida
		Piezas p_elegida = new Piezas();
		p_elegida.asignarPiezas();
			
		//Tablero
		Tablero obj_tablero = new Tablero();
		obj_tablero.creacionTablero();
		obj_tablero.imprimirPieza(p_elegida);
		//Contador de piezas
		System.out.println("");
		System.out.println("Piezas = " +c);
		c++;
		
		//Tecla enter
		Partida enter = new Partida();
		tecla = enter.funcionEnter();
		}while((tecla != "\n") && (c!=250) );
	}

}

[Norm]

Please post the code here on the forum so it can be read without a download.
Be sure to wrap the code in code tags.

[adri_360]

Please post the code here on the forum so it can be read without a download.
Be sure to wrap the code in code tags.

It gave me an error sending my code

[Norm]

Can you copy the console from when you execute the program and paste it here?
What is the required input for a user of the program?

[adri_360]

Can you copy the console from when you execute the program and paste it here?
What is the required input for a user of the program?

* *
* *
_ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _

Piezas = 0
<Pulse enter>
I haven't any mistakes. I need to put down the piece.
The user only have to press 'enter' to show the next piece to display the next piece to be placed, and shows on the 'board' the previous piece.

[Norm]

I need to put down the piece.

Can you explain what "put down the piece" means?

What is the purpose of waiting for the user to press Enter? Is that all the user has to do: Press Enter?

[adri_360]

Can you explain what "put down the piece" means?

What is the purpose of waiting for the user to press Enter? Is that all the user has to do: Press Enter?

The aim is that whenever the user press enter, the piece that goes out above appears below to the left side

[adri_360]

That is the exercise:
The objective of this project is to create a program that implements the known
Tetris game. The game is formed by a 8x8 board, in which
will positioning pieces. All parts fit within a square
3x3. The representation of the different parts depend on whether the symbol
draw a blank or *.

If all boxes in any row of the board are occupied, it is
emptied and boxes positioned above that row, will occupy the
bottom row.
Once there are no free spaces on the board to place a new
piece, the game is ended. It is considered that there is no free space,
if the part does not fit entirely within the board.
The practice consists of two parts: basic options and advanced options. to the
implement only the basic part is eligible for the 60% of the grade. the
implementation of the advanced part opt to allow 100% of the grade.
basic Options
This basic part will have to simulate a game of Tetris in which they are to
position x (the value will be introduced as an argument to launch the application)
parts. The x pieces will be chosen at random. The pieces are
positioning should go from left to right in the lower row of the board
containing enough space to fit that piece. On display will go
showing the state of the board as follows:
1. State the board (at the beginning it will be empty)
2. number of pieces have been placed,
3. The message "Press Enter", which will leave the implementation of the
simulation on hold until the user presses the Enter key.
4. After pressing a key, to show the new piece selected
place on the board and he will repeat the whole process.
The game ends when no more pieces to position or not fit
on the board.

[Norm]

Why is there a need to wait for the user to Press Enter? All that does is slow down the program.

Without waiting for the user, the program automatically loops 250 times.

[adri_360]

Why is there a need to wait for the user to Press Enter? All that does is slow down the program.

Without waiting for the user, the program automatically loops 250 times.

It's a project that the teacher sends to me

[Norm]

There are lots of lines of code without any comments saying what the code is trying to do.

One thing I see is that there are lots of new objects being created and the results of what the called methods do in those objects are lost when a new object is created.

Why is a new object created every time the funcionEnter() method is called?

[adri_360]

There are lots of lines of code without any comments saying what the code is trying to do.

One thing I see is that there are lots of new objects being created and the results of what the called methods do in those objects are lost when a new object is created.

Why is a new object created every time the funcionEnter() method is called?

Oh is a mistake. I'm noob on java :(. I just add some comments

[Norm]

Do any of the objects that are created need to be saved to preserve their contents?
If the references to the created objects are not saved, their contents is lost.

[adri_360]

Do any of the objects that are created need to be saved to preserve their contents?
If the references to the created objects are not saved, their contents is lost.

How to save their contents?

[Norm]

Save the reference to the object and reuse it as needed.