字节集-编码操作-中繁体-StringBuffer-包装类

Posted 2021-12-30 king-boy

package workhome;

public class BuilderDemo 
public static void main(String[] args) 
    //builder模式
    //方法链编程    
    Person1 p = new Person1()
                .setName("tom")
                .setAge(12)
                .setSex("女");

BuilderDemo

package workhome;

public class Person1 

    private String name;
    private int age;
    private String sex;
    
    
    public Person1 getName() 
        return this;
    
    public Person1 setName(String name) 
        this.name = name;
        return this;
    
    public Person1 getAge() 
        return this;
    
    public Person1 setAge(int age) 
        this.age = age;
        return this;
    
    public Person1 getSex() 
        return this;
    
    public Person1 setSex(String sex) 
        this.sex = sex;
        return this;
    
    
    

Person1

package workhome;

public class StringBuilderDemo 
public static void main(String[] args) 
    StringBuilder b=new StringBuilder();
    b.append(1)
     .append(2)
     .append(3);

StringBuilderDemo

 

package workhome;

public class WrapperDemo 
public static void main(String[] args) 
    Byte b=new Byte((byte)12);
    Short s= new Short((short)12);
    
    Long l=new Long(12);
    Boolean bb=new Boolean(true);
    long ll=11L;
    float f=12.3f;
    Integer.toHexString(100);

WrapperDemo