1-(1) XML

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

android:padding="10dp">

<TextView

android:id="@+id/textView1"

android:layout_height="wrap_content"

android:layout_width="match_parent" />

<TextView

android:id="@+id/textView2"

android:layout_height="wrap_content"

android:layout_width="match_parent"/>

<Button

android:id="@+id/button1"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="나는 누구?" />

</LinearLayout>

1-(2) Java

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Color;

import android.graphics.Typeface;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

TextView tv1=(TextView)findViewById(R.id.textView1);

TextView tv2=(TextView)findViewById(R.id.textView2);

Button btn=(Button)findViewById(R.id.button1);

tv1.setText("안녕하세요?");

tv1.setTextColor(Color.BLUE);

tv2.setText("물리학과 2017103274 최정훈입니다");

tv2.setTypeface(Typeface.SANS_SERIF, Typeface.BOLD_ITALIC);

tv2.setTextSize(20);

btn.setOnClickListener(new View.OnClickListener(){

public void onClick(View v){

Toast.makeText(getApplicationContext(), "최정훈입니다.", Toast.LENGTH_SHORT).show();

}

});

}

2.

package tmp;

import java.util.Scanner;

public class TmpTest {

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

System.out.println("점수를 입력하세요:");

int inputD=sc.nextInt();

if(inputD>=90) {

System.out.println("A 학점");

}else if(inputD>=80) {

System.out.println("B 학점");

}else if(inputD>=70) {

System.out.println("C 학점");

}else if(inputD>=60) {

System.out.println("D 학점");

}else {

System.out.println("F 학점");

}

midterm