package java_stringof;
/**
*
* @web http://java-buddy.blogspot.com/
*/
public class Java_StringOf {
public static void main(String[] args) {
int src = 0xFF;
System.out.println("radix=2: " + Integer.toString(src, 2));
System.out.println("radix=8: " + Integer.toString(src, 8));
System.out.println("radix=10: " + Integer.toString(src, 10));
System.out.println("radix=16: " + Integer.toString(src, 16));
}
}
package java_dividebyzero;
/**
*
* @web http://java-buddy.blogspot.com/
*/
public class Java_DivideByZero {
public static void main(String[] args) {
System.out.println("\n--- Test Divide By Zero on int: 100/0 ---");
int int1 = 100;
int intResult;
try{
intResult = int1/0;
System.out.println(intResult);
}catch (ArithmeticException ex){
System.out.println("catched: " + ex);
}
System.out.println("\n--- Test Divide By Zero on float: 100/0 ---");
float float1 = 100;
float resultFloat;
try{
resultFloat = float1/0;
System.out.println(resultFloat);
System.out.println("resultFloat == Float.POSITIVE_INFINITY : " + (resultFloat == Float.POSITIVE_INFINITY));
System.out.println("resultFloat == Float.NEGATIVE_INFINITY : " + (resultFloat == Float.NEGATIVE_INFINITY));
System.out.println("resultFloat == Float.NaN : " + (resultFloat == Float.NaN));
}catch (ArithmeticException ex){
System.out.println("catched: " + ex);
}
System.out.println("\n--- Test Divide By Zero on double: -100/0 ---");
double double1 = 100;
double resultDouble;
try{
resultDouble = -1 * double1/0;
System.out.println(resultDouble);
System.out.println("resultDouble == Double.POSITIVE_INFINITY : " + (resultDouble == Double.POSITIVE_INFINITY));
System.out.println("resultDouble == Double.NEGATIVE_INFINITY : " + (resultDouble == Double.NEGATIVE_INFINITY));
System.out.println("resultDouble == Double.NaN : " + (resultDouble == Double.NaN));
}catch (ArithmeticException ex){
System.out.println("catched: " + ex);
}
}
}
package javafx_parsenum;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
/**
*
* @web http://java-buddy.blogspot.com/
*/
public class JavaFX_ParseNum extends Application {
@Override
public void start(Stage primaryStage) {
TextField textField = new TextField ();
Label answer1 = new Label();
Label answer2 = new Label();
Label answer3 = new Label();
Button btnCheck = new Button();
btnCheck.setText("- Check -");
btnCheck.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
String q = textField.getText();
try{
double parseDouble = Double.parseDouble(q);
answer1.setText("Double: " + String.valueOf(parseDouble));
}catch(NumberFormatException ex){
answer1.setText("Not a valid Double");
}
try{
float parseFloat = Float.parseFloat(q);
answer2.setText("Float: " + String.valueOf(parseFloat));
}catch(NumberFormatException ex){
answer2.setText("Not a valid Float");
}
try{
int parseInt = Integer.parseInt(q);
answer3.setText("Integer: " + String.valueOf(parseInt));
}catch(NumberFormatException ex){
answer3.setText("Not a valid Integer");
}
}
});
VBox vBox = new VBox();
vBox.setSpacing(5);
vBox.getChildren().addAll(textField, btnCheck,
answer1, answer2, answer3);
StackPane root = new StackPane();
root.getChildren().add(vBox);
Scene scene = new Scene(root, 560, 315);
primaryStage.setTitle("java-buddy.blogspot.com");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
