varargstester.java

基于netbeans的java桌面应用程序合集

package com.sun.tiger.vararg;

import java.io.IOException;
import java.io.PrintStream;
import java.util.LinkedList;
import java.util.List;

public class VarargsTester {
    
    public VarargsTester() {
    }
    
    private int[] getListOfNumbers() {
        int[] numbers = new int[] {0, 2, 4, 6, 8, 10, 9, 7, 5, 3, 1};
        return numbers;
    }
    
    private String print(Object... values) {
        StringBuilder sb = new StringBuilder();
        for (Object o : values) {
            sb.append(o.toString())
            .append(" ");
        }
        return sb.toString();
    }
    
    public void testMaxMethod(PrintStream out) throws IOException {
        int[] numbers = getListOfNumbers();
        
        int max = MathUtils.max(numbers);
        out.println("Max of list is: " + max);
    }
    
    public void testPrintMethod(PrintStream out) throws IOException {
        out.println(print("foo", 23, -12, 1.23, getListOfNumbers()));
    }
    
    public void testArrayArgs(PrintStream out) throws IOException {
        Object[] obj = new String[] {"Hello", "to", "all", "of", "you"};
        
        out.printf("%s\n", obj);
        out.printf("%s\n", (Object)obj);
    }
    
    public static void main(String[] args) {
        try {
            VarargsTester tester = new VarargsTester();
            
            tester.testMaxMethod(System.out);
            tester.testPrintMethod(System.out);
            tester.testArrayArgs(System.out);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}