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2010-06-01T05:03:11Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

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== Arabic Digits ==



<source lang="java">
import java.awt.Font;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class ArabicDigitsI18N extends JPanel {
public ArabicDigitsI18N() {
DecimalFormat df = (DecimalFormat) NumberFormat.getInstance();
DecimalFormatSymbols dfs = df.getDecimalFormatSymbols();
dfs.setZeroDigit("\u0660");
df.setDecimalFormatSymbols(dfs);
JLabel label = new JLabel(df.format(1234567.89));
label.setFont(new Font("Lucida Sans", Font.PLAIN, 22));
add(label);
}
public static void main(String[] argv) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add("Center", new ArabicDigitsI18N());
frame.pack();
frame.setVisible(true);
}
}</source>



== Displaying numbers with commas ==



<source lang="java">
import java.text.DecimalFormat;
public class Main {
public static void main(String args[]) {
double d = 123456.78;
DecimalFormat df = new DecimalFormat("#####0.00");
System.out.println(df.format(d));
}
}</source>



== Display numbers in scientific notation ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String args[]) {
NumberFormat formatter = new DecimalFormat();
int maxinteger = Integer.MAX_VALUE;
System.out.println(maxinteger);
formatter = new DecimalFormat("0.######E0");
System.out.println(formatter.format(maxinteger));
formatter = new DecimalFormat("0.#####E0");
System.out.println(formatter.format(maxinteger));
int mininteger = Integer.MIN_VALUE;
System.out.println(mininteger);
formatter = new DecimalFormat("0.######E0");
System.out.println(formatter.format(mininteger));
formatter = new DecimalFormat("0.#####E0");
System.out.println(formatter.format(mininteger));
double d = 0.12345;
formatter = new DecimalFormat("0.#####E0");
System.out.println(formatter.format(d));
formatter = new DecimalFormat("000000E0");
System.out.println(formatter.format(d));
}
}</source>



== Format a number with leading zeros ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] args) {
NumberFormat formatter = new DecimalFormat("0000000");
String number = formatter.format(2500);
System.out.println("Number with lading zeros: " + number);
}
}</source>



== new DecimalFormat("##00") ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat("##00");
String s = formatter.format(0); // 00
System.out.println(s);
}
}</source>



== new DecimalFormat("0.00") ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat("0.00");
String s = formatter.format(-.567); // -0.57
System.out.println(s);
}
}</source>



== new DecimalFormat("#.), append zero ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat("#.000000");
String s = formatter.format(-1234.567);
System.out.println(s);
}
}
//-1234.567000</source>



== new DecimalFormat("#,###,###"), group ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat("#,###,###");
String s = formatter.format(-1234.567);
System.out.println(s);
s = formatter.format(-1234567.890);
System.out.println(s);
}
}
// -1,235
// -1,234,568</source>



== new DecimalFormat(".######"), keep fraction ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat(".######");
String s = formatter.format(-1234.567); // -1234.567
System.out.println(s);
}
}//-1234.567</source>



== new DecimalFormat("#.######") more digits ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat("#.######");
String s = formatter.format(-1234.567); // -1234.567
System.out.println(s);
}
}</source>



== new DecimalFormat("#.#") two digits ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat("#.#");
String s = formatter.format(-1234.567); // -1234.6
System.out.println(s);
}
}</source>



== The 0 symbol shows a digit or 0 if no digit present ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat("000000");
String s = formatter.format(-1234.567);
System.out.println(s);
// number was rounded up
}
}
//-001235</source>



== The . symbol indicates the decimal point ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat(".00");
String s = formatter.format(-.567); // -.57
System.out.println(s);
}
}</source>



== The , symbol is used to group numbers ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat("#,###,###");
String s = formatter.format(-1234.567);
System.out.println(s);
s = formatter.format(-1234567.890);
System.out.println(s);
}
}
// -1,235
// -1,234,568</source>



== The " symbol is used to quote literal symbols ==



<source lang="java">
import java.text.DecimalFormat;
import java.text.NumberFormat;
public class Main {
public static void main(String[] argv) throws Exception {
NumberFormat formatter = new DecimalFormat(""#"#");
String s = formatter.format(-1234.567);
System.out.println(s);
}
}
//-#1235</source>



== The ; symbol is used to specify an alternate pattern for negative values ==



<source lang="java">
public class Main{
public static void main(String[] argv) throws Exception{
NumberFormat formatter = new DecimalFormat("#;(#)");
String s = formatter.format(-1234.567); // (1235)
sysout
}}</source>



== Use group separators and show trailing zeros ==



<source lang="java">
import java.text.DecimalFormat;
public class Main {
public static void main(String[] argv) throws Exception {
DecimalFormat df = new DecimalFormat("#,.00;(#,.00)");
System.out.println(df.format(7123.00));
}
}</source>

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Admin: 1 версия

в 17:44, 31 мая 2010