goldcode88’s gists

goldcode88 / 10return_multi_val.java

Last active April 2, 2017 02:13

Returning Multiple values in Java

	// A Java program to demonstrate that a method
	// can return multiple values of same type by
	// returning an array
	class Test
	{
	// Returns an array such that first element
	// of array is a+b, and second element is a-b
	static int[] getSumAndSub(int a, int b)
	{
	int[] ans = new int[2];

goldcode88 / array_return.java

Last active April 2, 2017 02:14

array返回值

	import java.util.*;

	class Test {
	public static int[] rotate90degrees(int[] v){
	int[] w = new int[2];
	w[0] = v[1];
	w[1] = v[0];

	return w;
	}

goldcode88 / 10error1.java

Last active April 2, 2017 02:14

ArrayList遍历的同时删除

	ArrayList<String> list = new ArrayList<String>();
	list.add("one");
	list.add("two");
	list.add("two");
	list.add("two");
	list.add("two");
	for(int i=0;i<list.size();i++){
	if(list.get(i).equals("two")){
	list.remove(i);
	}

goldcode88 / 05basic.java

Last active April 2, 2017 02:15

ArrayList在内循环中删除 1.The iterators returned by this class's iterator and listIterator methods are fail-fast: if the list is structurally modified at any time after the iterator is created, in any way except through the iterator's own remove or add methods, the iterator will throw a ConcurrentModificationException. 参考：http://stackoverflow.com/quest…

	import java.util.*;

	public class ArrayListExamples {

	public static void main(String args[]) {
	// Creating an empty array list
	ArrayList<String> list = new ArrayList<String>();

	// Adding items to arrayList
	list.add("Item1");

goldcode88 / 10comment.java

Created April 1, 2017 03:17

java注释： 1. // 2. /* 3. /** 参考：http://stackoverflow.com/questions/29815636/and-in-java-comments

	//Compares two {@code int} values numerically.
	//The value returned is identical to what would be returned by:
	public static int compare(int x, int y) {
	return (x < y) ? -1 : ((x == y) ? 0 : 1);
	}

goldcode88 / 10basic.java

Last active April 2, 2017 02:15

MIN_VALUE与MAX_VALUE 1.https://www.dotnetperls.com/integer-java 2.https://cmsdk.com/java/why-java-integer-minvalue-divided-by-2-not-overflow-but-divided-by-1-cause-39overflow39-duplicate.html 3.http://www.cs.grinnell.edu/~rebelsky/Espresso/Readings/binary.html#integers-in-java

	public class Program {
	public static void main(String[] args) {
	// Display common numeric types.
	System.out.println(Character.TYPE);
	System.out.println(Character.SIZE);
	System.out.println((int) Character.MIN_VALUE);
	System.out.println((int) Character.MAX_VALUE);

	System.out.println(Integer.TYPE);
	System.out.println(Integer.SIZE);

goldcode88 / new_gist_file_0

Last active April 2, 2017 02:15

变量初始化例子

	class Complex {
	private double re, im;
	//public int a,b,c=null; //fault
	public int a,b,c; //correct
	public String name,value=null;//correct

	public Complex(double re, double im) {
	this.re = re;
	this.im = im;
	a = 1;

goldcode88 / Complex_test1.java

Last active April 2, 2017 02:16

问题1:如何重载toString 1.toString是Objects的内部函数，不需要显式继承就可以覆盖，当然显式继承也可以。参见：http://www.geeksforgeeks.org/overriding-tostring-method-in-java/ 问题2: 2.为何重载了toString，println就会去调用它？参见：http://stackoverflow.com/questions/29318996/the-connection-between-system-out-println-and-tostring-in-java ...calls at first String.valueOf(x) to get the printed object's stri…

	// file name: Main.java

	class Complex {
	private double re, im;

	public Complex(double re, double im) {
	this.re = re;
	this.im = im;
	}
	}

goldcode88 / 0_reuse_code.js

Created April 1, 2017 01:52

Here are some things you can do with Gists in GistBox.

	// Use Gists to store code you would like to remember later on
	console.log(window); // log the "window" object to the console

goldcode88 / layout.kbd.json

Created December 11, 2016 10:08

Untitled Keyboard Layout

	[
	[
	"Esc",
	"!\n1",
	"@\n2",
	"#\n3",
	"$\n4",
	"%\n5",
	"^\n6",
	"&\n7",