SuhuActivity.java

package com.example.latihan1;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class SuhuActivity extends AppCompatActivity implements View.OnClickListener {

    Button btnhitung;
    EditText edsuhu;
    TextView tvhasil;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_suhu);
        btnhitung=findViewById(R.id.btn_suhu);
        edsuhu=findViewById(R.id.ed_suhu);

        btnhitung.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        String inputsuhu=edsuhu.getText().toString().trim();

        Double hasil = Double.valueOf(inputsuhu) + 273;
        tvhasil.setText(String.valueOf(hasil));
    }
}