Font

本文介绍了JavaFX中如何创建和使用Font对象。通过Font类的静态工厂方法,可以创建具有不同样式、大小的字体。Font实例可用于Text组件等,设置字体样式。此外,还展示了如何列出系统中已安装的字体家族和名称,以便在创建Font时进行选择。

■ 关于Font

一个Font类(java.scene.text.Font)对象,代表一种字体,包括样式,大小等
JavaFX可以使用不同的字体修饰不同可应用字体的组件

■ 创建Font

使用一种Font(字体)要先创建一个Font实例
最方便的方法就是通过Font类的静态工厂方法创建一个JavaFX Font实例

String fontFamily = "Arial";
double fontSize = 13;
FontWeight fontWeight = FontWeight.BOLD;
FontPosture fontPosture = FontPosture.ITALIC;

Font font1 = Font.font(fontFamily);
Font font2 = Font.font(fontSize);
Font font3 = Font.font(fontFamily, fontSize);
Font font4 = Font.font(fontFamily, fontWeight , fontSize);
Font font5 = Font.font(fontFamily, fontPosture, fontSize);
Font font6 = Font.font(fontFamily, fontWeight , fontPosture, fontSize);

■ 使用Font

字体一旦创建,就可以在任何可以应用字体的组件中使用
不同的组件设置字体的方法是不同的,Text组件是通过**setFont()**方法为文本设置字体的

Font font = Font.font("Arial");
Text text = new Text("This is the text");
text.setFont(font);

■ 列出安装的Font Family和Font Name

Font类提供了两个方法,即getFamilies()getFontNames(),用于列出JavaFX程序所运行的系统中安装的所有Font Family和Font Name
当创建一个Font实例时,就可以从中选择一种
可以在Font类的工厂方法fontFamily里指定一个Font Family或者Font Name作为参数

List<String> fontFamilies = Font.getFamilies();
List<String> fontNames    = Font.getFontNames();

for(String item : fontFamilies) {
    System.out.println(item);
}
for(String item : fontNames) {
    System.out.println(item);
}
import pandas as pd import numpy as np import matplotlib.pyplot as plt from scipy.signal import savgol_filter # 修正函数名称 from sklearn.decomposition import PCA from sklearn.cluster import KMeans from sklearn.preprocessing import StandardScaler import seaborn as sns from matplotlib.ticker import MaxNLocator # 设置中文显示 plt.rcParams["font.family"] = ["SimHei", "WenQuanYi Micro Hei", "Heiti TC"] plt.rcParams["axes.unicode_minus"] = False # 解决负号显示问题 # 1. 读取数据 - 请将此处路径修改为你的文件实际路径 df = pd.read_excel('附件 1_预处理后.xlsx') # 修改为本地文件路径 # 提取光谱数据(排除No列) spectra_data = df.iloc[:, 1:].values # 所有样本的光谱数据 wavelengths = df.columns[1:].astype(int) # 波数 sample_ids = df['No'].values # 样本编号 # 2. SG平滑与一阶导数处理(使用论文问题一参数) window_length = 11 # 窗口大小 poly_order = 2 # 多项式阶数 # SG平滑 - 使用修正后的函数名称 sg_smoothed = savgol_filter(spectra_data, window_length, poly_order, axis=1) # 一阶导数 sg_first_deriv = np.gradient(sg_smoothed, axis=1) # 3. 数据标准化 scaler = StandardScaler() scaled_data = scaler.fit_transform(sg_first_deriv) # 4. PCA降维(根据论文问题一,SG一阶导数需要12个主成分) pca = PCA(n_components=12) pca_result = pca.fit_transform(scaled_data) # 5. K-means聚(分为6个别) kmeans = KMeans(n_clusters=6, random_state=42, n_init=10) clusters = kmeans.fit_predict(pca_result) # 6. 保存聚结果 cluster_results = pd.DataFrame({ '样本编号': sample_ids, '聚别': clusters + 1 # 别从1开始 }) cluster_results.to_excel('聚结果.xlsx', index=False) print("聚结果已保存至'聚结果.xlsx'") # 7. 可视化聚结果(图9SG风格) # 7.1 各别中心光谱一阶导数曲线 plt.figure(figsize=(12, 8)) for cluster_id in range(6): # 获取该别的所有样本 cluster_samples = sg_first_deriv[clusters == cluster_id] # 计算均值曲线 mean_curve = np.mean(cluster_samples, axis=0) # 绘制曲线 plt.plot(wavelengths, mean_curve, label=f'别{cluster_id + 1}', linewidth=2) plt.xlabel('波数 (cm⁻¹)') plt.ylabel('SG一阶导数') plt.title('各别SG一阶平滑导数平均曲线') plt.legend(loc='best') plt.grid(alpha=0.3) plt.tight_layout() plt.savefig('各别SG一阶导数平均曲线.png', dpi=300) plt.show() # 7.2 PCA降维可视化(前2个主成分) plt.figure(figsize=(10, 8)) scatter = plt.scatter(pca_result[:, 0], pca_result[:, 1], c=clusters, cmap='tab10', alpha=0.7, s=50) plt.xlabel(f'主成分1 (贡献率: {pca.explained_variance_ratio_[0]:.2%})') plt.ylabel(f'主成分2 (贡献率: {pca.explained_variance_ratio_[1]:.2%})') plt.title('PCA降维聚散点图 (前2个主成分)') plt.colorbar(scatter, label='聚别') plt.grid(alpha=0.3) plt.tight_layout() plt.savefig('PCA降维聚散点图.png', dpi=300) plt.show() # 7.3 聚别数量统计 plt.figure(figsize=(8, 6)) sns.countplot(x=clusters + 1) plt.xlabel('聚别') plt.ylabel('样本数量') plt.title('各别样本数量分布') plt.xticks(range(6), [f'别{i+1}' for i in range(6)]) plt.gca().yaxis.set_major_locator(MaxNLocator(integer=True)) # 确保y轴为整数 plt.grid(axis='y', alpha=0.3) plt.tight_layout() plt.savefig('各别样本数量分布.png', dpi=300) plt.show() # 8. 输出聚中心的主成分值 cluster_centers = pd.DataFrame( kmeans.cluster_centers_, columns=[f'主成分{i+1}' for i in range(12)] ) cluster_centers.index.name = '聚别' cluster_centers.index += 1 # 别从1开始 print("\n聚中心的主成分值:") print(cluster_centers) 代码如上 报错内容如下 E:\Anaconda\python.exe "C:\Users\cheny\Desktop\PythonProject2\图 9SG 一阶平滑导数聚特征别.py" E:\Anaconda\Lib\site-packages\sklearn\cluster\_kmeans.py:1429: UserWarning: KMeans is known to have a memory leak on Windows with MKL, when there are less chunks than available threads. You can avoid it by setting the environment variable OMP_NUM_THREADS=2. warnings.warn( 聚结果已保存至'聚结果.xlsx' findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. C:\Users\cheny\Desktop\PythonProject2\图 9SG 一阶平滑导数聚特征别.py:66: UserWarning: Glyph 8315 (\N{SUPERSCRIPT MINUS}) missing from font(s) SimHei. plt.tight_layout() C:\Users\cheny\Desktop\PythonProject2\图 9SG 一阶平滑导数聚特征别.py:66: UserWarning: Glyph 185 (\N{SUPERSCRIPT ONE}) missing from font(s) SimHei. plt.tight_layout() findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. C:\Users\cheny\Desktop\PythonProject2\图 9SG 一阶平滑导数聚特征别.py:67: UserWarning: Glyph 8315 (\N{SUPERSCRIPT MINUS}) missing from font(s) SimHei. plt.savefig('各别SG一阶导数平均曲线.png', dpi=300) C:\Users\cheny\Desktop\PythonProject2\图 9SG 一阶平滑导数聚特征别.py:67: UserWarning: Glyph 185 (\N{SUPERSCRIPT ONE}) missing from font(s) SimHei. plt.savefig('各别SG一阶导数平均曲线.png', dpi=300) findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not 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'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. C:\Users\cheny\Desktop\PythonProject2\图 9SG 一阶平滑导数聚特征别.py:68: UserWarning: Glyph 8315 (\N{SUPERSCRIPT MINUS}) missing from font(s) SimHei. plt.show() C:\Users\cheny\Desktop\PythonProject2\图 9SG 一阶平滑导数聚特征别.py:68: UserWarning: Glyph 185 (\N{SUPERSCRIPT ONE}) missing from font(s) SimHei. plt.show() findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found. findfont: Font family 'WenQuanYi Micro Hei' not found. findfont: Font family 'Heiti TC' not found.
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