カテゴリー: Java

# VSCode Extension Pack for Java
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Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
        Unreachable catch block for InvalidPropertiesFormatException. This exception is never thrown from the try statement body
        Unreachable catch block for FileNotFoundException. This exception is never thrown from the try statement body
        Unreachable catch block for IOException. This exception is never thrown from the try statement body
        at XMLtoSetProperty.main(XMLtoSetProperty.java:32)
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# javacコマンド
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XMLtoSetProperty.java:32: エラー: 例外FileNotFoundExceptionは対応するtry文の本体ではスローされません
		} catch (FileNotFoundException e){
		  ^
XMLtoSetProperty.java:34: エラー: 例外IOExceptionは対応するtry文の本体ではスローされません
		} catch (IOException e){
		  ^
XMLtoSetProperty.java:36: エラー: 例外InvalidPropertiesFormatExceptionはすでに捕捉されています
		} catch (InvalidPropertiesFormatException e){
		  ^
XMLtoSetProperty.java:58: エラー: 例外IOExceptionは報告されません。スローするには、捕捉または宣言する必要があります
				in.close();
				        ^
XMLtoSetProperty.java:54: エラー: 例外FileNotFoundExceptionは報告されません。スローするには、捕捉または宣言する必要があります
			in = new FileInputStream(file);
			     ^
XMLtoSetProperty.java:55: エラー: 例外IOExceptionは報告されません。スローするには、捕捉または宣言する必要があります
			settings.loadFromXML(in);
			                    ^
エラー6個
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// Windows,Macはサイズ8,Ubuntuは7,Linux Mintは10に設定

public static int font_size(){
	String OS = System.getProperty("os.name").toLowerCase();
	int[] font_sizes = new int[1];
	if (OS.contains("linux")){
		try{
			Process p = Runtime.getRuntime().exec("cat /etc/issue");
			try{
				p.waitFor();
				InputStream is = p.getInputStream();
				InputStreamReader inputStreamReader = new InputStreamReader(is);
				Stream<String> streamOfString= new BufferedReader(inputStreamReader).lines();
				String str = streamOfString.collect(Collectors.joining());
								
				if (str.contains("Ubuntu")){
					int font_size = 7;
					font_sizes[0] = font_size;
				}else if (str.contains("Mint")){
					int font_size = 10;
					font_sizes[0] = font_size;
				}else{
					int font_size = 8;
					font_sizes[0] = font_size;
				}
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			
		} catch (IOException e) {
			e.printStackTrace();
		}
	} else {
		int font_size = 8;
		font_sizes[0] = font_size;
	}
	return font_sizes[0];
}

＜メソッドのみ＞

static int[] showDialog(Component component, String title, Color initialColor) throws HeadlessException{
		int[] color_case = new int[4];
		JColorChooser chooser = new JColorChooser(initialColor != null ? initialColor : Color.white);

		String swatches = UIManager.getString("ColorChooser.swatchesNameText");
		String hsv = UIManager.getString("ColorChooser.hsvNameText");
		String hsl = UIManager.getString("ColorChooser.hslNameText");
		String rgb = UIManager.getString("ColorChooser.rgbNameText");
		String cmyk = UIManager.getString("ColorChooser.cmykNameText");

		List<String> list = Arrays.asList(hsv,hsl,rgb);

		for (AbstractColorChooserPanel p : chooser.getChooserPanels()) {
			if (!list.contains(p.getDisplayName())) {
				chooser.removeChooserPanel(p);
			}
		}
		
		ColorTracker tracker = new ColorTracker(chooser,initialColor);

		ActionListener okListener = new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				int[] colors = tracker.getColor();
				color_case[0] = colors[0];
				color_case[1] = colors[1];
				color_case[2] = colors[2];
				color_case[3] = colors[3];
			}
		};

		ActionListener cancelListener = new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				int[] colors = tracker.getInitial();
				color_case[0] = colors[0];
				color_case[1] = colors[1];
				color_case[2] = colors[2];
				color_case[3] = colors[3];
			}
		};

		// ダイアログを作成
		JDialog dialog = JColorChooser.createDialog(component, title, true, chooser, okListener, cancelListener);
		dialog.setVisible(true);

		return color_case;
	}

	static class ColorTracker implements Serializable{
		JColorChooser chooser;
		Color color;
		int red;
		int green;
		int blue;
		int alpha;
		int[] colors;
	  
		ColorTracker(JColorChooser Chooser,Color initialColor){
			this.chooser = Chooser;
			this.color = initialColor;
			
		}
	  
		int[] getColor(){
			this.color = this.chooser.getColor();

			colors = new int[4];
			colors[0] = this.color.getRed();
			colors[1] = this.color.getGreen();
			colors[2] = this.color.getBlue();
			colors[3] = this.color.getAlpha();

			return colors;
		}
		int[] getInitial(){
			colors = new int[4];
			colors[0] = this.color.getRed();
			colors[1] = this.color.getGreen();
			colors[2] = this.color.getBlue();
			colors[3] = this.color.getAlpha();

			return colors;
		}
	}

＜ライブラリは省略＞

public class AdjustButtonAction{
    public static void main(){
      adj_btn.addActionListener(new ActionListener(){
			@Override
			public void actionPerformed(ActionEvent e){
				if(e.getSource() == adj_btn){
					Color defaultColor = new Color(65,105,225);
					Color color = showDialog(parent, "色の調整", defaultColor);

					if(color == null) {
						System.out.println("選択されず");
					}else {
						System.out.println("R " + color.getRed());
						System.out.println("G " + color.getGreen());
						System.out.println("B " + color.getBlue());
        			}
				}
			}
		});
    }
	
	static Color showDialog(Component component, String title, Color initialColor) throws HeadlessException{
		JColorChooser chooser = new JColorChooser(initialColor != null ? initialColor : Color.white);
		
		// デフォルトの下段にあるプレビューを非表示にする
		chooser.setPreviewPanel(new JPanel());

		String swatches = UIManager.getString("ColorChooser.swatchesNameText");
		String hsv = UIManager.getString("ColorChooser.hsvNameText");
		String hsl = UIManager.getString("ColorChooser.hslNameText");
		String rgb = UIManager.getString("ColorChooser.rgbNameText");
		String cmyk = UIManager.getString("ColorChooser.cmykNameText");
		System.out.println("swatches " + swatches);
		System.out.println("hsv " + hsv);
		System.out.println("hsl " + hsl);
		System.out.println("rgb " + rgb);
		System.out.println("cmyk " + cmyk);

		// 色フォーマットのタブを選択
		List<String> list = Arrays.asList(hsv,hsl,rgb,cmyk);

		for (AbstractColorChooserPanel p : chooser.getChooserPanels()) {
			if (!list.contains(p.getDisplayName())) {
				chooser.removeChooserPanel(p);
			}
		}
	
		// ダイアログ作成
		ColorTracker ok = new ColorTracker(chooser);
		JDialog dialog = JColorChooser.createDialog(component, title, true, chooser, null, null);

		dialog.setVisible(true); 

		return ok.getColor();

	}
	static class ColorTracker implements ActionListener, Serializable{
		JColorChooser chooser;
		Color color;
	  
		ColorTracker(JColorChooser Chooser){
			this.chooser = Chooser;
		}
	  
		public void actionPerformed(ActionEvent e){
		}
	  
		Color getColor(){
			this.color = this.chooser.getColor();
			System.out.println("this.color " + this.color);
		return this.color;
		}
	}
}
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出力
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swatches サンプル(S)
hsv HSV(H)
hsl HSL(L)
rgb RGB(G)
cmyk CMYK
this.color java.awt.Color[r=65,g=105,b=225]
R 65
G 105
B 225

# Testプロジェクトのbin/baseにあるメインクラスを実行
cd /Test/bin
java --enable-preview base.Main

# 仮jarの実行
java -jar --enable-preview test.jar

javap -v classファイル名 | grep "version"
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出力
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minor version: 65535
major version: 61

minor version: 0
major version: 61

# MacにインストールしたJDKのリスト出力
/usr/libexec/java_home -V
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出力
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Matching Java Virtual Machines (4):
    17.0.1 (arm64) "Oracle Corporation" - "Java SE 17.0.1" /Library/Java/JavaVirtualMachines/jdk-17.0.1.jdk/Contents/Home
    17.0.1 (x86_64) "Eclipse Temurin" - "Eclipse Temurin 17" /Library/Java/JavaVirtualMachines/temurin-17.jdk/Contents/Home
    1.8.321.07 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
    1.8.0_302 (x86_64) "Eclipse Temurin" - "Eclipse Temurin 8" /Library/Java/JavaVirtualMachines/temurin-8.jdk/Contents/Home

# jar実行ファイルの依存モジュールを調べる
jdeps --list-deps test.jar

# カスタムJREの作成コマンド例
jlink --compress=2 \
    --module-path "/Library/Java/JavaVirtualMachines/jdk-17.0.1.jdk/Contents/Home/jmods" \
    --add-modules java.base,java.datatransfer,java.desktop,java.xml \
    --output [ランタイムイメージの出力先フォルダパス] \
    --strip-debug \
    --no-header-files