- char类型
- java 判断 char 是否为空格 和 空
11111
// java 判断 char 是否为空格 和 空
public static void main (String[] args) {
String str = "abc abc";
char [] ch = str.toCharArray();
for (int i = 0;i<ch.length;i++) {
if (Character.isSpace(ch[i]))
System.out.println("ok");
}
}
public static void main1 (String[] args) {
char M = 'A';
if (M != '\0') {
System.out.println("字符串M不为空");
}
char [] N = new char[1];
if (N[0] == '\0') {
System.out.println("字符串N[0]为空");
}
}
- Map
- Map 的put 和 putAll 的区别
Map<String,String> mode1 = new HashMap<String,String>();
mode.put("a","1");
mode.put("b","2");
System.out.println(mode);
Map<String,String> mode2 = new HashMap<String,String>();
mode2.put("aa","11");
mode2.put("bb","22");
mode2.putAll(mode);
System.out.println(mode2);
结果:
{a,1},{b,2}
{a,1},{b,2},{aa,11},{bb,22}
- 触发 button 按钮方法,及提交表单
$(function () {
$("#updateForm").click(function() {
var fform = $("#updateForm");
fform.submit();
});
});