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 java函数Lesson2
软件技术
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lesson2
//输出ASCII值System.out.println(c1.charValue()+0);System.out.println(c2.charValue()+0);
//比较两个字符ASCII码值的大小int i=c1.compareTo(c2);System.out.println(i);
//大小写转换System.out.println(Character.toLowerCase('A')+" "+Character.toUpperCase('a')); //判断是否是数字System.out.println(Character.isDigit('9'));
//访问字符串长度String myname="zhang jian";int length="虎妞".length();System.out.println("长度1："+myname.length());System.out.println("长度2："+length);
//比较字符串的大小String name1="zhangjian is java";String name2="zhangjian is java";System.out.println("比较1："+name1.equals(name2));//输出是FLASESystem.out.println("比较2："+name2.equalsIgnoreCase(name2));//输出是TRUESystem.out.println("比较3："+name2.compareTo("Program"));//输出是正数]
//访问字符串中的字符System.out.println("字符1："+name1.charAt(4));//输出是g不是rSystem.out.println("字符2："+name1.indexOf('a'));//输出5System.out.println("字符3："+name2.lastIndexOf('a'));
//访问字符串中的子串String subname="is";System.out.println("子串1："+name1.substring(3,10));//输出angjianSystem.out.println("子串2："+"abc".concat("123"));//abc123System.out.println("子串2："+name2.startsWith("Pro"));//输出TRUESystem.out.println("子串4："+name2.endsWith ("in java"));//输出TRUESystem.out.println("子串5："+name1.indexOf(subname));//输出8System.out.println("子串6："+name1.lastIndexOf(subname));//输出12 //字符串其他操作System.out.println("小写："+name2.toLowerCase());//输出zhangjian is javaSystem.out.println("大写："+name2.toUpperCase());//输出ZHANGJIAN IS JAVASystem.out.println("替换："+name1.replace('a','A'));//输出zhAngjiAn jAvA
StringBuffer sb=new StringBuffer("java");double d=5.0;sb.append(d).append(" hava ").append(new String("a lot of new features"));//添加输出System.out.println(sb);sb.insert(4," SDK ");//插入输出System.out.println(sb);sb.delete(7,16);System.out.println(sb.reverse());//倒序输出 | |
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回复:java函数Lesson2
软件技术 |
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xcvsd(游客)发表评论于2006/11/11 3:09:48
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