IntelliJ IDEA Live Templates

盤點IDEA中Tab的實用招式，再配上alt+insert就能橫著走了

基本聲明

psvm或main ▶ main 方法

st ▶ String

prsf ▶ private static final

psf ▶ public static final
    psfi ▶ public static final int
    psfs ▶ public static final String

創立物件

類名.new ▶ new 類名()

new 類名().var或.val ▶ 類 物件名 = new 類();

new 類名().field ▶ 在方法外聲明一個成員變量，並在這裡初始化一個

print

sout ▶ System.out.println();

souf ▶ System.out.printf("");

"say something".sout ▶ System.out.println("say something");

obj.sout ▶ System.out.println(obj);

obj.soutv ▶ System.out.println("obj = " + obj);

// 標準錯誤輸出流，這個無緩衝，顯示的位置可能跟你想像的不同
obj.serr ▶ System.err.println(obj);

遍歷相關

fori ▶ for (int i = 0; i < ; i++)

itar ▶ for (int i = 0; i < arr.length; i++)

iter ▶ foreach

數組或集合物件.for ▶ foreach

數組物件.forr ▶ for (int i = arr.length - 1; i >= 0; i--) // 反向

itit ▶ 遍歷，while (iterator.hasNext()) { iterator.next()

類型轉換

// 適用於多態物件，例如Object obj = new String();

instr ▶ 檢查包含 instanceof 的物件類型並向下轉換

obj.cast ▶ ((String) obj)
((String) obj).var ▶ String obj1 = (String) obj;

也可以一次搞定
obj.castvar ▶ String s = (String) obj;

if相關

bool.if ▶ if (bool) {

obj.null ▶ if (obj == null) {

obj.nn ▶ if (obj != null) {

異常相關

執行語句();.try ▶ 用try-catch包裹

thr ▶ throw new

new RuntimeException().throw ▶ throw new RuntimeException();

其他

"some string".format ▶ 格式化字串

物件.synchronized ▶ synchronized (obj) {

obj.return ▶ return obj;

在方法上/** + Enter ▶ 產生方法與參數說明

上次修改於 2021-12-03