Android Linear Layout XML description in JAVA code

linearlayoutxml.java

package com.example.rough;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

import androidx.annotation.Nullable;

public class LinearTest extends Activity {
    LinearLayout linearLayout;
    Button button;
    TextView textView;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        linearLayout = new LinearLayout(this);
        button = new Button(this);
        textView = new TextView(this);
        LinearLayout.LayoutParams dimension = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
        linearLayout.setLayoutParams(dimension);
        LinearLayout.LayoutParams viewDimension = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        button.setLayoutParams(viewDimension);
        textView.setLayoutParams(viewDimension);

        linearLayout.setOrientation(LinearLayout.VERTICAL);
        textView.setText("Shirshak");
        button.setText("Next");

        linearLayout.addView(textView);
        linearLayout.addView(button);
        setContentView(linearLayout);
    }
}