package com.winterbe.java8.samples.misc;
/**
* @author Benjamin Winterberg
*/
public class Math1 {
public static void main(String[] args) {
testMathExact();
testUnsignedInt();
}
private static void testUnsignedInt() {
try {
Integer.parseUnsignedInt("-123", 10);
}
catch (NumberFormatException e) {
System.out.println(e.getMessage());
}
long maxUnsignedInt = (1l << 32) - 1;
System.out.println(maxUnsignedInt);
String string = String.valueOf(maxUnsignedInt);
int unsignedInt = Integer.parseUnsignedInt(string, 10);
System.out.println(unsignedInt);
String string2 = Integer.toUnsignedString(unsignedInt, 10);
System.out.println(string2);
try {
Integer.parseInt(string, 10);
}
catch (NumberFormatException e) {
System.err.println("could not parse signed int of " + maxUnsignedInt);
}
}
private static void testMathExact() {
System.out.println(Integer.MAX_VALUE);
System.out.println(Integer.MAX_VALUE + 1);
try {
Math.addExact(Integer.MAX_VALUE, 1);
}
catch (ArithmeticException e) {
System.err.println(e.getMessage());
}
try {
Math.toIntExact(Long.MAX_VALUE);
}
catch (ArithmeticException e) {
System.err.println(e.getMessage());
}
}
}