Java SE 7新機能！ Android開発目線で

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amyusan

http://atnd.org/events/41192の発表資料

Technology News & Politics

自己紹介
美馬優貴
大学生
OCPでLPIClv3
AWSとAndroid開発を少々
twitter:@amyu_san
13年8月9日金曜日

うわっ…私のJavaのVer、
低すぎ…？
＞＞あなたの適正Ver
無料5分で、適正Verや
Java基礎能力が分かる
「市場価値診断テスト」。
受けた人は1人を突破！
結果もすぐわかると大人気
CHECK!
13年8月9日金曜日

Android requires
compiler compliance
level 5.0 or 6.0. Found
'1.7' instead
13年8月9日金曜日

String s = “aaaa”;
switch(s){
case “aaaa”:
System.out.println(“aaaa”);
break;
case “bbbb”:
System.out.println(“bbbb”);
break;
case “cccc”:
System.out.println(“cccc”);
break;
default:
System.out.println(“”);
break;
}
String s = “aaaa”;
if (s == “aaaa”){
System.out.println(“aaaa”);
}else if(s==”bbbb”){
System.out.println(“bbbb”);
}else if(s==”cccc”){
System.out.println(“cccc”);
}else{
System.out.println(“”);
}
13年8月9日金曜日

String item = クリックされた文字;
Intent intent = new Intent();
switch(item){
case “amyu”:
intent.putExtra(“test”,1);
break;
case “amya”:
intent.putExtra(“test”,2);
break;
case “amyo”:
intent.putExtra(“test”,3);
break;
}
String item = クリックされた文字;
Intent intent = new Intent();
if (item == “amyu”){
intent.putExtra(“test”,1);
}else if(item == ”amya”){
intent.putExtra(“test”,2);
}else if(item == ”amyo”){
intent.putExtra(“test”,3);
}
13年8月9日金曜日

case:nullは使えないよ！
だからNull処理をしないと
13年8月9日金曜日

String s = “aaaa”;
if(s!=null){
switch(s){
case “aaaa”:
System.out.println(“aaaa”);
break;
case “bbbb”:
System.out.println(“bbbb”);
break;
case “cccc”:
System.out.println(“cccc”);
break;
default:
System.out.println(“”);
break;
} else {
}
}
13年8月9日金曜日

System.out
.println(binary);
=>19
13年8月9日金曜日

String ybin = Integer
.toBinaryString(binary)
13年8月9日金曜日

String ybin = Integer
.toBinaryString(binary)
=>10011
13年8月9日金曜日

int number = 123_456_789
=>12345678
13年8月9日金曜日

javaSE6まで
List<String> aaa =
new
ArrayList<String>();
13年8月9日金曜日

javaSE7になったら！
List<String> aaa =
new ArrayList<>();
13年8月9日金曜日

Spinner
ListView
ExpandableList
etc...
13年8月9日金曜日

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Java SE 7新機能！ Android開発目線で

1. Java SE7 新機能！ Android開発目線で 13年8月9日金曜日

2. 自己紹介美馬優貴大学生 OCPでLPIClv3 AWSとAndroid開発を少々 twitter:@amyu_san 13年8月9日金曜日

3. Androidアプリ作ってたら 13年8月9日金曜日

4. 13年8月9日金曜日

5. うわっ…私のJavaのVer、低すぎ…？＞＞あなたの適正Ver 無料5分で、適正Verや Java基礎能力が分かる「市場価値診断テスト」。受けた人は1人を突破！結果もすぐわかると大人気 CHECK! 13年8月9日金曜日

6. 仕方ない、1.7にするか 13年8月9日金曜日

7. 13年8月9日金曜日

8. Android requires compiler compliance level 5.0 or 6.0. Found '1.7' instead 13年8月9日金曜日

9. AndroidはJava7に対応していない！ 13年8月9日金曜日

10. もしAndroidがJava7 対応していたら！ 13年8月9日金曜日

11. switch 13年8月9日金曜日

12. String s = “aaaa”; switch(s){ case “aaaa”: System.out.println(“aaaa”); break; case “bbbb”: System.out.println(“bbbb”); break; case “cccc”: System.out.println(“cccc”); break; default: System.out.println(“”); break; } String s = “aaaa”; if (s == “aaaa”){ System.out.println(“aaaa”); }else if(s==”bbbb”){ System.out.println(“bbbb”); }else if(s==”cccc”){ System.out.println(“cccc”); }else{ System.out.println(“”); } 13年8月9日金曜日

13. String s = “aaaa”; switch(s){ case “aaaa”: System.out.println(“aaaa”); break; case “bbbb”: System.out.println(“bbbb”); break; case “cccc”: System.out.println(“cccc”); break; default: System.out.println(“”); break; } String s = “aaaa”; if (s == “aaaa”){ System.out.println(“aaaa”); }else if(s==”bbbb”){ System.out.println(“bbbb”); }else if(s==”cccc”){ System.out.println(“cccc”); }else{ System.out.println(“”); } 13年8月9日金曜日

14. ListView 13年8月9日金曜日

15. 13年8月9日金曜日

16. 13年8月9日金曜日

17. String item = クリックされた文字; Intent intent = new Intent(); switch(item){ case “amyu”: intent.putExtra(“test”,1); break; case “amya”: intent.putExtra(“test”,2); break; case “amyo”: intent.putExtra(“test”,3); break; } String item = クリックされた文字; Intent intent = new Intent(); if (item == “amyu”){ intent.putExtra(“test”,1); }else if(item == ”amya”){ intent.putExtra(“test”,2); }else if(item == ”amyo”){ intent.putExtra(“test”,3); } 13年8月9日金曜日

18. String item = クリックされた文字; Intent intent = new Intent(); switch(item){ case “amyu”: intent.putExtra(“test”,1); break; case “amya”: intent.putExtra(“test”,2); break; case “amyo”: intent.putExtra(“test”,3); break; } String item = クリックされた文字; Intent intent = new Intent(); if (item == “amyu”){ intent.putExtra(“test”,1); }else if(item == ”amya”){ intent.putExtra(“test”,2); }else if(item == ”amyo”){ intent.putExtra(“test”,3); } 13年8月9日金曜日

19. case:nullは使えないよ！だからNull処理をしないと 13年8月9日金曜日

20. String s = “aaaa”; if(s!=null){ switch(s){ case “aaaa”: System.out.println(“aaaa”); break; case “bbbb”: System.out.println(“bbbb”); break; case “cccc”: System.out.println(“cccc”); break; default: System.out.println(“”); break; } else { } } 13年8月9日金曜日

21. ガッ 13年8月9日金曜日

22. 2進数リテラル 13年8月9日金曜日

23. 13年8月9日金曜日

24. int binary = 0b10011; 13年8月9日金曜日

25. System.out .println(binary); 13年8月9日金曜日

26. System.out .println(binary); =>19 13年8月9日金曜日

27. String ybin = Integer .toBinaryString(binary) 13年8月9日金曜日

28. String ybin = Integer .toBinaryString(binary) =>10011 13年8月9日金曜日

29. アンダースコア付き数値リテラル 13年8月9日金曜日

30. ....。 13年8月9日金曜日

31. int number = 123_456_789 13年8月9日金曜日

32. int number = 123_456_789 =>12345678 13年8月9日金曜日