javafont,java font設置字體大小

本文目錄一覽：

• 1、Java 關於Font類的字體設置
• 2、為什麼java 中我用了font沒有改變字體只能改變自形和大小
• 3、java中如何讀取ttf字體文件，生成Font數組

Java 關於Font類的字體設置

import java.awt.BorderLayout;

import java.awt.Choice;

import java.awt.Color;

import java.awt.Dimension;

import java.awt.Font;

import java.awt.Frame;

import java.awt.GraphicsEnvironment;

import java.awt.Label;

import java.awt.event.ItemEvent;

import java.awt.event.ItemListener;import javax.swing.JLabel;public class Test_24 extends Frame implements ItemListener { private static final long serialVersionUID = 1L;

Choice c;

JLabel l; public static void main(String[] args) {

new Test_24(); } public Test_24() {

super();

initialize();

} private void initialize() {

this.setSize(300, 200);

this.setTitle(“Frame”);

GraphicsEnvironment g = GraphicsEnvironment

.getLocalGraphicsEnvironment();

String fontName[] = g.getAvailableFontFamilyNames();

c = new Choice();

for (int i = 0; i fontName.length; i++)

c.add(fontName[i]);

l = new JLabel(“”, JLabel.CENTER);

this.add(c, BorderLayout.NORTH);

this.add(l, BorderLayout.CENTER);

this.setVisible(true);

c.addItemListener(this);

this.addWindowListener(new java.awt.event.WindowAdapter() {

public void windowClosing(java.awt.event.WindowEvent e) {

System.exit(0);

}

});

} public void itemStateChanged(ItemEvent e) {

String name = (String) e.getItem();

System.out.println(name);

Font f = new Font(name, Font.ITALIC, 40);

l.setForeground(Color.red);

l.setFont(f);

l.setText(“測試字體”);

double x=l.getLocation().getX();

double y=l.getLocation().getY();

int h = l.getSize().height;

int w = l.getSize().width;

System.out.println(x+”,”+y);

System.out.println(h+”,”+w);

}}

為什麼java 中我用了font沒有改變字體只能改變自形和大小

很簡單，因為你把一個表達式fontName[id_font]用雙引號括起來了。變成了一個字元串常量”fontName[id_font]”  .  而用這個字元串常量，根本就找不到對應字體，所以無法更改字體

解決辦法去掉雙引號即可

java中如何讀取ttf字體文件，生成Font數組

1.讀取

import java.awt.Font;

import java.io.File;

import java.io.FileInputStream;

public class Loadfont

{

public static Font loadFont(String fontFileName, float fontSize) //第一個參數是外部字體名，第二個是字體大小

{

try

{

File file = new File(fontFileName);

FileInputStream aixing = new FileInputStream(file);

Font dynamicFont = Font.createFont(Font.TRUETYPE_FONT, aixing);

Font dynamicFontPt = dynamicFont.deriveFont(fontSize);

aixing.close();

return dynamicFontPt;

}

catch(Exception e)//異常處理

{

e.printStackTrace();

return new java.awt.Font(“宋體”, Font.PLAIN, 14);

}

}

public static java.awt.Font Font(){

String root=System.getProperty(“user.dir”);//項目根目錄路徑

Font font = Loadfont.loadFont(root+”/data/PRISTINA.ttf”, 18f);//調用

return font;//返回字體

}

public static java.awt.Font Font2(){

String root=System.getProperty(“user.dir”);//項目根目錄路徑

Font font = Loadfont.loadFont(root+”/data/XXXX.ttf”, 18f);

return font;//返回字體

}

}

2.轉換：

public static String ascii2native(String ascii) {

int n = ascii.length() / 6;

StringBuilder sb = new StringBuilder(n);

for (int i = 0, j = 2; i n; i++, j += 6) {

String code = ascii.substring(j, j + 4);

char ch = (char) Integer.parseInt(code, 16);

sb.append(ch);

}

return sb.toString();

}