Stringクラスメソッドの例
package com.zhidi.test2;
public class Test4 {
//System.out.println(string.replace);System.out.println(string);
}
public class Test4 {
public static void main(String[] args) {
String str = "! , , Java, , Hello World";
char[] c = {' ',' ',' ',' '};
char[] c3 = new char[10];
c3[0]='0';
c3[1]='0';
c3[2]='0';
c3[3]='0';
str.getChars(1, 5, c3, 3);
for (char d : c3) {
System.out.print(d+" ");
}
System.out.println();
System.out.println(str.length());//
System.out.println(str.charAt(str.length()-1));//
System.out.println(str.concat(" "));// ,
System.out.println(String.copyValueOf(c, 2, 2));// ,
char[] c2 = str.toCharArray();//
System.out.println(String.copyValueOf(c2, 5, 4));
System.out.println(str.startsWith("!"));//
System.out.println(str.endsWith("Java !"));//
byte[] b = str.getBytes();// byte ,
System.out.println(str.indexOf("Java"));//
System.out.println(str.lastIndexOf(' '));//
System.out.println(str.isEmpty()); // 0 , true, false
System.out.println(str.replace(" ", "***"));//
System.out.println("==================================");
String[] s = str.split(" "); //
for (String string : s) {
//System.out.println(string.replace);System.out.println(string);
System.out.println("==================================");
System.out.println(str.substring(10,15));// ,[ , )
System.out.println(str.toLowerCase());//
System.out.println(str.toUpperCase());//
System.out.println(str.trim());//
}
}